diketahui f(x) = 3{x}^{4} - 5 {x}^{2} + 7 - 15 dan g(x) = 2 {x}^{3} - 8 {x}^{2} + 9 maka f(x).g(x) = mohon bantuanya

f(x) = 3x^4 - 5x^2 +7 - 15
f(x) = 3x^4 - 5x^2 - 8

g(x) = 2x^3 - 8x^2 + 9

maka
f(x).g(x)
= (3x^4 - 5x^2 - 8) (2x^3 - 8x^2 + 9)

= 6x^7 - 24x^6 + 27x^4 - 10x^5 + 40x^4 - 45x^2 - 16x^3 + 64x^2 - 71

= 6x^7 - 24x^6 - 10x^5 67x^4 - 16x^3 + 19x^2 - 72

lets Rock....

sorry ...mohon periksa lagi...aku siap edit