SOLUTION: If f(x)=x^2-3 and f(a)=46, what is the value of a. Explain

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Question 1049800: If f(x)=x^2-3 and f(a)=46, what is the value of a. Explain
Found 2 solutions by advanced_Learner, MathLover1:
Answer by advanced_Learner(501) About Me  (Show Source):
You can put this solution on YOUR website!
If f(x)=x^2-3 and f(a)=46, what is the value of a. Explain
If f(a)=a^2-3 , f(a)=46
If 46=a^2-3
49=a^2
a=7
a=-7

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

If f%28x%29=x%5E2-3 and f%28a%29=46, the value of ais:
46=x%5E2-3......solve for x
46%2B3=x%5E2
49=x%5E2
x=sqrt%2849%29
x=7 or x=-7=>a=7 or a=-7