Question

Completing the square:
11. x^2-12x-6=22
12. x2+3x=4

Answer 1

Answer:

11)

x² - 12x - 6 = 22

x² - 12x - 28

x² + 2x - 14x - 28 = 0

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

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

x = ±2

12)

x² + 3x = 4

x² + 3x - 4 = 0

x² - x + 4x - 4 = 0

x(x-1)+4(x-1) = 0

(x-1)(x+4) = 0

x = -4 , 1

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