What is the the value of the function x^2+3 at x-5?

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What is the the value of the function x^2+3 at x-5? And also at argument 10?

Guest Dec 17, 2014

+118723

+5

Best Answer

It is strange wording but I think this is what is meant

Are you sure that was x-5 perhaps it should have been x=5

$$\\f(x)=x^2+3\\\\
f(x-5)=(x-5)^2+3=x^2-10x+25+3=x^2-10x+28\\\\
f(10)=10^2+3=100+3=103$$

Melody Dec 17, 2014

Melody · Answer 1 · 2014-12-17T08:31:05

It is strange wording but I think this is what is meant

Are you sure that was x-5 perhaps it should have been x=5

$$\\f(x)=x^2+3\\\\
f(x-5)=(x-5)^2+3=x^2-10x+25+3=x^2-10x+28\\\\
f(10)=10^2+3=100+3=103$$