Question

factorize the following
$factorize the following 1).y ^{2} - 16y - 105$
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Answer 1

Step-by-step explanation:

${y}^{2} - 16y - 105 \\ = {y}^{2} - 21y + 5y - 105 \\ = y(y - 21) + 5(y - 21) \\ = (y + 5)(y - 21)$