\[-{3}^{2}+2{(-2)}^{2}\]
1
Simplify  32{3}^{2}  to  99.
−9+2(−2)2-9+2{(-2)}^{2}

2
Since the power of 2 is even, the result will be positive.
−9+2×22-9+2\times {2}^{2}

3
Use Product Rule: xaxb=xa+b{x}^{a}{x}^{b}={x}^{a+b}.
−9+23-9+{2}^{3}

4
Simplify  23{2}^{3}  to  88.
−9+8-9+8

5
Simplify.
−1-1

Done
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