### Home > PC3 > Chapter 7 > Lesson 7.1.4 > Problem7-49

7-49.

If $f(x)=3x^2+5x-2$, show that: Homework Help ✎

1. $f(x+2)=3x^2+17x+20$

$f(x+2)=3(x+2)^2+5(x+2)-2$

2. $f(x+h)=3x^2+x(6h+5)+(3h^2+5h-2)$

Substitute $(x+h)$ for every $x$ in $f(x)$.