X square + 8 x + 16
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Answer:
x² + 8x + 16 = 0
x² + 4x + 4x + 16 = 0
x(x + 4) + 4(x + 4) = 0
(x+4)(x+4) = 0
(x+4)² = 0
x + 4 = 0
x = -4
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