Question
Solve: $(2x+3)^2= 81$
✓
Answer
$(2 x+3)^2=81$
$\Rightarrow 2 x-3= \pm 9$
$\Rightarrow2 x+3=9$ and $2 x+3=-9$
$\Rightarrow2 x+3=9$ and $2 x=-12$
$\Rightarrow x=3$ and $x=-6$
$\Rightarrow 2 x-3= \pm 9$
$\Rightarrow2 x+3=9$ and $2 x+3=-9$
$\Rightarrow2 x+3=9$ and $2 x=-12$
$\Rightarrow x=3$ and $x=-6$
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