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Quadratic formula/discriminant

Authored by Daniel Nieto

Mathematics

9th - 12th Grade

CCSS covered

Used 59+ times

Quadratic formula/discriminant
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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solve using quadratic formula

 3x2+6x+3=03x^2+6x+3=0  

x = -1

x = 1,3

x = 3

x=−1±3x=-1\pm\sqrt{3}

Tags

CCSS.HSA-REI.B.4B

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solve using the quadratic equation
 2x2+4x=302x^2+4x=30  

x = -3, 12

 x=−5±3x=-5\pm\sqrt{3}  

 x = ±5x\ =\ \pm\sqrt{5}  

x = 3, -5

Tags

CCSS.HSA-REI.B.4B

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solve equation using quadratic equation

2x2 + 3x- 4 = 0

x=3±75x=\frac{3\pm\sqrt{7}}{5}

x=−3±414x=\frac{-3\pm\sqrt{41}}{4}

x=−4±295x=\frac{-4\pm\sqrt{29}}{5}

x=2±293x=\frac{2\pm\sqrt{29}}{3}

Tags

CCSS.HSA-REI.B.4B

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solve using the quadratic equation

x2 - 14x = -49

x = 1

x = 2

x = 7

x = 21

Tags

CCSS.HSA-REI.B.4B

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solve equation using quadratic formula

x2 + 6x + 15 = 0

x=3±i6x=3\pm i\sqrt{6}

x = −3±6ix\ =\ -3\pm6i

x=3±6ix=3\pm6i

x = −3±i6x\ =\ -3\pm i\sqrt{6}

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 4x2−4x−24=04x^2-4x-24=0  

Solve using the quadratic formula

x = 0, 2

x = -2, 3

x = 2, 5

x = 1, 4

Tags

CCSS.HSA-REI.B.4B

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Solve equation using quadratic equation

-4x2 + 3x = -5

x=3±898x=\frac{3\pm\sqrt{89}}{8}

x=3±58x=\frac{3\pm\sqrt{5}}{8}

x=−3±898x=\frac{-3\pm\sqrt{89}}{8}

x=−3±298x=\frac{-3\pm\sqrt{29}}{8}

Tags

CCSS.HSA-REI.B.4B

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