12/10 - Solving Quadratics Practice

What are the roots/solutions?

(x + 5)(2x - 3) = 0

• x = 5 ; x = -³/₂

• x = -5 ; x = ³/₂

• x = -5 ; x = 3

• 2x² + 7x - 15

Solve by factoring.

2x² + 2x - 12 = 0

• x = 3 ; x = -3

• x = 12 ; x = -12

• x = -3 ; x = 2

• x = -2 ; x = 2

Solve by factoring:
x² + 3x - 18 = 0

• x = -3 and x = 6
• x = 3 and x = -6
• x = -9 and x = 2
• x = 9 and x = -2

Solve the following quadratics equation by completing the square...

x² + 12x + 10 = 0

• x = -6 ± √26

• x = 6 ± √26

• x = 26 ± √6

• x = -26 ± √6

solve using the quadratic formula

2x²-8x-24=0

• x= 6, -2

• x= 2, -6

• x= 4, 2

• x= 2, 6

Solve the following quadratics equation by completing the square...

x² + 4x + 1 = 0

• x = -2 ± √3

• x = -3 ± √2

• x = 2 ± √3

• x = 2 ± √2

Solve the following quadratics equation by completing the square...

x² + 6x - 3 = 0

• x = -3 ± √12

• x = 3 ± √12

• x = 12 ± √3

• x = -12 ± √3

Solve the following quadratics equation by completing the square...

x² + 4x - 1 = 0

• x = -2 ± √5

• x = -5 ± √2

• x = 2 ± √5

• x = -5 ± √5

Solve by using the quadratic formula.

n² - 2n - 3 = 0

• {3 and-1}

• {4 and -4}

• {5 and -3}

• {8 and -7}

Solve using square roots.

 $0=x^2+64$  

•  $-8\ ,\ 8$  

•  $8i,\ -8i$  

•  $-i\sqrt{8},\ \ i\sqrt{8}$  

•  $-\sqrt{8},\ \ \sqrt{8}$