diketahui f(x)=2x+5,g(x)=x²+1 dan h(x)=(fog) (x) rumus komposisi (hof)(x)= a. 8x²+80x+57. b. 8x²+40x+57. c.8x²+20x+32. d.4x²+20x+32. e.4x²+20x+25

h = (fog)
(fog) = 2(x^2+1) + 5
= 2x^2 + 2 + 5
= 2x^2 + 7

(hof) = 2(2x+5)^2 + 7
= 2 (2x+5)(2x+5) + 7
= 2 (4x^2 + 10x + 10x + 25) + 7
= 8x^2 + 20x + 20x + 50 + 7
= 8x^2 + 40x + 57

jawaban = B

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