Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$-4-( { -3 }^{ 2) } +9$$

Answer

-4

Solution


Since the power of 2 is even, the result will be positive.
\[-4-{3}^{2}+9\]
Simplify  \({3}^{2}\)  to  \(9\).
\[-4-9+9\]
Simplify  \(-4-9\)  to  \(-13\).
\[-13+9\]
Simplify.
\[-4\]
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