Solve Quadratics by Square Root Vertex Form

Solve by completing the square:
x² + 6x = 55

• x = -14, 2

• x = 14, -2

• x = -5, 11

• x = 5, -11

Tags

CCSS.HSA-REI.B.4B

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

• {11, -11}

• {16, 2}

• {20, -2}

• {10, -4}

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square. Round if needed.
x² -4x -5= 0

• 11 and -7

• 1 and 3

• 1.73 and -1.73

• 5 and -1

Tags

CCSS.HSA-REI.B.4B

Solve using the square root property.

x² = 16

• ± 4

• ± 8

• 4

• 8

Tags

CCSS.HSA-REI.B.4B

What does the vertex form of the equation allow us to find easily?

• y-intercept

• vertex

• concave up or down

• stretch or compress

• x-intercepts

Solve for x.

(x - 7)² + 4 = 40

• x = -1, -13

• x = 1, 7

• x = -1, -7

• x = 1, 13

• x = -7, -13

Tags

CCSS.HSA-REI.B.4B

Solve using square roots.

• A

• B

• C

• D

Tags

CCSS.HSA-REI.B.4B

What does the vertex form of the equation allow us to find easily?

• y-intercept

• vertex

• concave up or down

• stretch or compress

• x-intercepts

What is the equation of the quadratic shown in vertex form?

What is the vertex form of this quadratic?

• f(x) = -(x - 2)² + 0

• f(x) = (x - 2)² + 0

• f(x) = -(x + 2)² + 0

• f(x) = (x + 2)² + 0