What is the value of the discriminant and how many solutions would this equation have? x 2 - 6x + 9 = 0

discriminant = 0 1 real solution

discriminant = 72 2 real solutions

discriminant = -72 2 complex solutions

What is the discriminant and how many solutions would this equation have? -8x 2 + 6x - 4 = 0

discriminant = -92 2 complex solutions

discriminant = 164 2 real solutions

discriminant = -164 2 complex solutions

discriminant = 92 2 real solutions

What is the discriminant and how many solutions would this equation have? 4x 2 + 6x - 4 = 0

discriminant = 100 2 real solutions

discriminant = -28 2 complex solutions

discriminant = 28 2 real solutions

discriminant = -100 2 complex solutions

Simplify − 200 \sqrt{-200} − 2 0 0 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

10 i 2 10i\sqrt{2} 1 0 i 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

10 2 10\sqrt{2} 1 0 2 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

2 i 10 2i\sqrt{10} 2 i 1 0 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

2 10 2\sqrt{10} 2 1 0 <path d="M95,702c-2.7,0,-7.17,-2.7,-13.5,-8c-5.8,-5.3,-9.5, -10,-9.5,-14c0,-2,0.3,-3.3,1,-4c1.3,-2.7,23.83,-20.7,67.5,-54c44.2,-33.3,65.8, -50.3,66.5,-51c1.3,-1.3,3,-2,5,-2c4.7,0,8.7,3.3,12,10s173,378,173,378c0.7,0, 35.3,-71,104,-213c68.7,-142,137.5,-285,206.5,-429c69,-144,104.5,-217.7,106.5, -221c5.3,-9.3,12,-14,20,-14H400000v40H845.2724s-225.272,467,-225.272,467 s-235,486,-235,486c-2.7,4.7,-9,7,-19,7c-6,0,-10,-1,-12,-3s-194,-422,-194,-422 s-65,47,-65,47z M834 80H400000v40H845z">

Quadratic Formula and Complex Numbers

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Mathematics

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11th Grade

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Practice Problem

•

Hard

•

CCSS

HSA-REI.B.4B, HSN.CN.A.2, HSN.CN.A.1

Standards-aligned

Melissa Black

FREE Resource

20 questions

Show all answers

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Find the sum.
(5-2i) + (-7+8i)

-2+6i

12+6i

-35-16i²

-35 -16i

Tags

CCSS.HSN.CN.A.2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which expression is equivalent to (3 - 4i) – (4 + 5i)?

-1-9i

-9-i

7+i

7-9i

Tags

CCSS.HSN.CN.A.2

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Multiply:
(2-5i)(2+5i)

4 - 25i

25 - 10i

-21

Tags

CCSS.HSN.CN.C.8

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

(2+i)(3-4i)

10 - 5i

5 -10i

2 + 5i

2+11i

Tags

CCSS.HSN.CN.A.2

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

-1-i

Tags

CCSS.HSN.CN.A.3

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

i²=

-1

Tags

CCSS.HSN.CN.A.1

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

i =

-1

Tags

CCSS.HSN.CN.A.1

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