Question

Please help me, im struggling

Answer 1

Part 1

`f(a)=4-7a+16a^2`

Part 2

`f(a+h)=4-7(a+h)+16(a+h)^2\\\\=4-7(a+h)+16(a^2 +2ah+h^2)\\\\=4-7a-7h+16a^2 +32ah+16h^2`

Part 3

`(f(a+h)-f(a))/(h)=((4-7a-7h+16a^2 +32ah+16h^2-(4-7a+16a^2))/(h)\\\\=(-7h+32ah+16h^2)/(h)\\\\=32a+16h-7`