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OpenStudy (anonymous):
Rearrange to make x the subject y = -7(4 +x)^2
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OpenStudy (saifoo.khan):
\[\sqrt{y} / -7 \]
OpenStudy (saifoo.khan):
-4
OpenStudy (nowhereman):
well... \[y \leq 0 ⇒ x = \sqrt{-\frac{y}{7}}-4\]
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