Mathematics
LongVacca399
17

Solve x2 + 12x = –20 by completing the square.

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(2) Answers
joycesouza

x^2 +12x = -20 take the coefficient of X divide it by 2 square that number then add it to both sides of the equation. 12 / 2 = 6 6^2 = 36 x^2 +12x +36 = 16 (X+6) * (X+6) = 4*4 X+6 = 4            X= -2 X+6 = -4          X= -10

lourvz

Solve x2 + 12x = –20 by completing the square.Add  to both sides of the equation. The value of  in this equation is 36Write the left side of the equation as a binomial squared. The left side of the equation becomes (x+6)2.Use the square root property of equality.Isolate the variable: x = -10 and -2  Please mark me as brainlist :(

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