Solving Quadratics Practice

Which method is most efficient to solve:
7x²  - 28 = 0

• Square Roots
• Factoring
• Completing the Square
• Quadratic Formula

Which method is most efficient to solve:
x²  -  6x + 2 = 0

• Square Roots
• Factoring
• Completing the Square
• Quadratic Formula

Which method is most efficient to solve:
x²  -  11x + 10 = 0

• Square Roots
• Factoring
• Completing the Square
• Quadratic Formula

Which method is most efficient to solve:
.02x²  -  .5x + 3 = 0

• Square Roots
• Factoring
• Completing the Square
• Quadratic Formula

Which method is most efficient to solve:
8x²  -  5x  = 0

• Square Roots
• Factoring
• Completing the Square
• Quadratic Formula

What are the roots?
(x + 5)(2x - 3) = 0

• x = 5 ; x =  -³/₂
• x = -5 ; x = ³/₂
• x = -5 ; x = 3
• 2x² + 7x - 15

What are the roots?
2x² + 2x - 12 = 0

• x = 3 ; x = -3
• x = 12 ; x =  -12
• x = -3 ; x = 2
• x = -2 ; x = 2

What are the zeros of the function?
f(x) = x² + x - 20

• x = 5 ; x = -4
• x = -20 ; x = 0
• x = -5 ; x = 4
• x = 20; x = 0

Next step in completing the square?
3x² + 18x - 6 = 0
1: 3x² + 18x  = 6
2: 3(x² + 6x) = 6
3: ?

• 3(x² + 6x + 9) = 6 + 9
• 3(x² + 6x + 36) = 6 + 36
• (x² + 6x) = 9
• 3(x² + 6x + 9) = 6 + 27

What are the x-intercepts?
x² + 6x - 3 = f(x)