If y 2= y + 7, then what is the value of y 3?
8y + 7
Multiply both sides of \(y^2=y+7\) by \(y\):
\[y^3=y^2+7y\]
Substitute \(y^2=y+7\):
\[y^3=(y+7)+7y=8y+7\]
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