Q1 MATH 9 REVIEW

Which of the following is a quadratic equation?

• 3x−5=0

• x²+4x−7 = 0

• 
  2x³+x²=0

• 1. 5x+2y=10

What is the standard form of the quadratic equation 5 - 2x² = 6x?

• −2x²−6x+5=0

• 2x²+6x−5=0

• −2x²+6x+5=0

• 2x²−6x−5=0

Which quadratic equation has roots 33 and -4?

• x² - x - 12 = 0

• x² + x - 12 = 0

• x² - 7x + 12 = 0

• x² + 7x + 12 = 0

Solve: x² = 81.

• ±8

• ±9

• ±7

• ±6

Solve: x² - 100 = 0.

• 
  ±10

• ±9

• ±11

• ±8

Solve: 2x² = 50.

• ±5

• ±5√2

• ±10

• ±25

Solve (x−4)² = 25.

• x=9 and x=−1

• x=1 and x=9

• x=−9 and x=1

• x=−1 and x=−9

8.

Solve (x+3)² = 36

• x=−9 and x=3

• x=9 and x=−3

• x=3 and x=9

• 
  x=−3 and x=−9

9. 9.

10. Solve x²+9x = −8x by factoring.

• x = -8 and x = -1

• x = 8 and x = 1

• x = -4 and x = -2

• x = 4 and x = 2

1. Solve x² + 7x = 0 by factoring.

• x = 0, x = -7

• x = 7, x = 0

• x = -1, x = -6

• x = 3, x = -10