Solving with Square Roots and Completing the Square

Solve   4x² - 6 = 30

• x = 3
• x = ±3
• x = 9
• x = ±9

Tags

CCSS.8.EE.A.2

Solve 3(x + 5)² = 30

• x = 5 & - 15
• x = ±2.23
• x = -1.83 & -8.16
• x = -1.83 & 8.16

Solve 9x² + 6 = 10 - 7x²

• x = ±1.41
• x = ±1
• x = ±20
• x = ±1⁄2

What value of c is needed to make the following a perfect square trinomial?
x² + 32 + c

• 16
• 1024
• 256
• 4

Solve the following equation by completing the square:
n² - 2n - 3 = 0

• {3 and-1}
• {4 and -4}
• {5 and -3}
• {8 and -7}

Solve the equation by completing the square:
x²+ 6x - 4 = 36

• x = ±7
• x = 4, -10
• x = -4 + - 7
• x = 10, -4

Solve by completing the square. Round.
x² - 4x = 5

• 11 and -7
• 1 and 3
• 1.73 and -1.73
• 5 and -1

What value of c is needed to make this a perfect square trinomial?
x² - 18x + c

• 9
• 324
• 81
• 3

How do you rewrite x² - 10x + 25 as a binomial squared?

• (x - 10)²
• (x - 5)²
• (x + 5)²
• (x + 25)²

Solve by completing the square
4x² - 32x + 8 = 12

• x = 8.12 & -0.12
• x = 8.12 & 0.12
• x = -8.12 & 0.12
• x = -8.12 & -0.12