Skills Check Pre-Calculus 2-#4

Solve by factoring: x² = 7x + 18

• -7 and -18

• 9 and 2

• 9 and -2

• 2 and 7

Tags

CCSS.HSA-REI.B.4B

Solve the following quadratic equation...

x² + 4x - 32 = 0

• x = 8

  x = -4

• x = -8

  x = 4

• x = -2

  x = 16

• x = 2

  x = -16

Tags

CCSS.HSA-REI.B.4B

3x²+12=39

• x = √27

• x = ±3√27

• x = ±3

• x = ±9

Tags

CCSS.8.EE.A.2

(x - 7)² = 5

• x = 7-√5

• x = 7+√5

• x = √5

• x = 7±√5

Tags

CCSS.HSA-REI.B.4B

What is the first step to solving THIS equation by completing the square?
a² + 10a + 21 = 0

• Set the equation equal to zero

• Divide 10 by 2 and add the result to both sides

• Add a² and 10a together

• Subtract the 21

Tags

CCSS.HSA-REI.B.4B

Complete the square for
x² + 12x + ____

• x² + 12x + 144

• x² + 12x + 36

• x² + 12x - 36

• x² + +12x - 144

Tags

CCSS.HSA-REI.B.4B

Solve the following equation by completing the square:
n² = 18n + 40

• {11 and -11}

• {16 and 2}

• {20 and -2}

• {10 and -4}

Tags

CCSS.HSA-REI.B.4B