Solving Quadratics Formative

Solve using the square root method:
3x² - 108 = 0

• 6√3 and -6√3
• 6 and -6
• 2 and -2
• no solution

Tags

CCSS.HSA-REI.B.4B

Solve using the square root method:
x² + 5 = 17

• √12 and -√12
• √22 and -√22
• 2√3 and -2√3
• no solution

Tags

CCSS.HSA-REI.B.4B

Solve using the square roots method:
2x² - 126 = 0

• 16 and - 16
• 3√7 and -3√7
• 7√3 and -7√3
• no solution

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square:
x² - 6x + 9 = 20

• 3 + 2√5 and 3 - 2√5
• ± √20
• -3 ± 5√√2
• no solutions

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square:
x² + 12x + 43 = 0

• -6 ± √7
• ± 1
• 6 + √7 and 6 - √7
• No solution

Tags

CCSS.HSA-REI.B.4B

Solve by completing the square
x² + 16x - 21 = -5

• 8 ± 5√4
• -8 ± 4√5
• -8 ± 4√2
• no solution

Tags

CCSS.HSA-REI.B.4B

Solve the problem by factoring.
x² - 16 = 0

• 8 and - 8
• 4 and - 4
• 64 and -64
• no solution

Tags

CCSS.HSA-REI.B.4B

Solve by factoring:
x² - 18x + 56 = 0

• 5 and 9
• 9 and -9
• 4 and 14
• no solution

Tags

CCSS.HSA-REI.B.4B

Solve by factoring:
2x² - x - 3 = 0

• 1/4 and 5/4
• -1 and 3/2
• 3 and 2
• no solution

Tags

CCSS.HSA-REI.B.4B

A quadratic function that has two solutions must __________.

• touch the x-axis once.
• touch the y-axis once.
• cross the x-axis twice.
• never crosses the x-axis.

Tags

CCSS.HSF-IF.C.7A