Use the function expression f(x) = x2 (power of 2) + 7 to find x if f(x) = 23
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Answer:
f(x)=23
then,
f(x)=x^2+7
23=x^2+7
23-7=x^2
16=x^2
x= 4
verify--
x^2+7=23
4^2+7=23
16+7=23
23=23
LHS=RHS
hence,
x =4 ans.
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