Question

×2+8×+15
$x2 + 8x + 15$

Answer 1

${x}^{2} + 8x + 15 = 0 \\ {x}^{2} + 3x + 5x + 15 = 0 \\ x(x + 3) + 5(x + 3) = 0 \\ (x + 3)(x + 5) = 0 \\ \\ x = - 3 \: and \: - 5$
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