Question

--- f(x) = 3x – 4 g(x) = -x2 + 2x – 5 h (x) = 2x2 +1 j(x) = 6x2 k(x) = 3x2 – x +7 Calculate (g+h) (2). 82

Answer 1

We have:

`g(x)=-x^2+2x-5`

And:

`h(x)=2x^2+1`

In order to calculate (g+h)(2) we first add both equations:

`g(x)+h(x)=(-x^2+2x-5)+(2x^2+1)^{}`
`\Rightarrow g(x)+h(x)=x^2+2x-4`

When now replace x by 2:

`(g+h)(2)=(2)^2+2(2)-4\Rightarrow(g+h)(2)=4`