Factor -z^2+42z+49 - Math help

Math

$- z^{2} + 42 z + 49$

Factor $- 1$ out of $- z^{2}$ .

$- (z^{2}) + 42 z + 49$

Factor $- 1$ out of $42 z$ .

$- (z^{2}) - (- 42 z) + 49$

Rewrite $49$ as $- 1 (- 49)$ .

$- (z^{2}) - (- 42 z) - 1 (- 49)$

Factor $- 1$ out of $- (z^{2}) - (- 42 z)$ .

$- (z^{2} - 42 z) - 1 (- 49)$

Factor $- 1$ out of $- (z^{2} - 42 z) - 1 (- 49)$ .

$- (z^{2} - 42 z - 49)$

Factor -z^2+42z+49

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