Question

$y = (x + 7) {}^{2} \: \: y = 49$
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Answer 1

Ответ:

${(x + 7)}^{2} = {x}^{2} + 14x + 49 \\ {x}^{2} + 14x + 49 = 0 \\ x1 + x2 = - 14 \\ x1x2 = 49 \\ \\ x = - 7 \\ \\ {x}^{2} + 14x + 49 = 49 \\ {x}^{2} + 14x = 0 \\ x(x + 14) = 0 \\ x 1= 0 \: \: \: \: \: \: \: \: x 2 = - 14$