Jawab:
a) (hogof)(x)= 8x² + 192 x + 1.140
b) (gohof)(x)​= 4x² + 104 x + 650

___
f(x) = x + 11, g(x) = 2x - 2, dan h(x) = 2x² +8x - 4. Tentukan:

a. (hogof)(x)
= h [ g{f(x)}]
= h [ g(x+11)]
= h [ 2(x +11)]
= h (2x+ 22)
= 2(2x + 22)²  +8(2x+22) - 4
= 2 (4x² + 88 x + 484)+ 16 x + 176 - 4
= 8x² +176 x + 968 + 16x  + 176 - 4
= 8x² + 192 x + 1.140

b. (gohof)(x)​

= g [ h{f(x)}]
= g [ h {x+ 11}]
= g [ 2(x+ 11)² + 8(x + 11) - 4 ]
= g [ 2(x² +22x +121) + 8x + 88 - 4]
= g [ 2x² + 44x + 242 + 8x + 88 - 4]
= g [ 2x² + 52 x+ 326]
= 2(2x² + 52 x+ 326) - 2
= 4x² +104 x + 652 - 2
= 4x² + 104 x + 650