a)f(2)=2^2+7=4+7=11
f(-3)=-3^2+7=9+7=16
b)x^2+7=7 x^2+7=32
x^2=0 х^2=25
x=0 х=5
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a)f(2)=2^2+7=4+7=11
f(-3)=-3^2+7=9+7=16
b)x^2+7=7 x^2+7=32
x^2=0 х^2=25
x=0 х=5