Pre Test in Mathematics 9

How many real roots does the quadratic equation

x²+5x +7 =0

• 0

• 1

• 2

• 3

Tags

CCSS.HSA-REI.B.4B

In this equation 3x² + 7x -4 =0, which is the quadratic term?

• x²

• 7x

• 3x²

• -4

The roots of a quadratic equations are -5 and 3. Which of the following quadratic equations has these roots?

• x² -8x + 15 =0

• x² + 8x + 15 =0

• x² -2x -15 =0

• x² +2x -15 =0

Tags

CCSS.HSA-SSE.B.3B

CCSS.HSF-IF.C.8A

Which of the following mathematical statements is a quadratic inequality?

• 2r² -3r -5 =0

• 7h +12 <0

• 3r² +7t-2≥0

• s² +8s +15 =0

Which of the following quadratic equations has no real roots?

• 2x² + 4x =3

• t² - 8t -4 =0

• 3s² -2s=-5

• -2r² + r +7 =0

Tags

CCSS.HSA-REI.B.4B

What is the nature of the roots of the quadratic equation if the value of its discriminant is zero?

• The roots are not real/

• The roots are irrational and not equal

• The roots are rational and not equal

• The roots are rational and equal.

Tags

CCSS.HSA-REI.B.4B

What are the roots of the quadratic equation x² +x -56 =0?

• 2 and -1

• 8 and -7

• -8 and 7

• 3 and -2

Tags

CCSS.HSA-REI.B.4B

What is the sum of the roots of the quadratic equation

x² + 6x -14 =0.

• -7

• -6

• -3

• 14

Tags

CCSS.HSA-REI.B.4B

Which of the following quadratic equations can be solved easily by extracting square roots?

• x² + 7x +12 =0

• 2w² +7w -3 =0

• 4t² -9 =0

• 3v² +2v -8 =0

Tags

CCSS.HSA-REI.B.4B

A 3 cm by 3 cm square piece of cardboard was cut from a bigger square cardboard. The area of the remaining cardboard was 40 cm². If s represents the lenght of the bigger cardboard, which of the following expressions give the area of the remaining piece?

• s-9

• s²+9

• s² - 9

• s²+40