Function Notation

Question

0

628

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+4

I need help with for the following.

Given f(x)=x^2+x, evaluate and simplify each of the following:

1. f(x-1)
2 .2f(x)

durhanAshkir Jun 14, 2015

+129845

+5

Best Answer

For the first one, we're just putting (x - 1) into x^2+x....so we have

(x - 1)^2 + (x - 1) = (x^2 - 2x + 1) + (x - 1) = x^2 - x

For the second, we're just multiplying f(x) by 2, so ...... 2 [ x^2 + x ] = 2x^2 + 2x

CPhill Jun 15, 2015

CPhill · Answer 1 · 2015-06-15T02:35:09

For the first one, we're just putting (x - 1) into x^2+x....so we have

(x - 1)^2 + (x - 1) = (x^2 - 2x + 1) + (x - 1) = x^2 - x

For the second, we're just multiplying f(x) by 2, so ...... 2 [ x^2 + x ] = 2x^2 + 2x