Jawabanmu

2014-01-11T07:14:51+07:00
Dengan metode substitusi :
f(-2)=[tex] 2(-2)+2(-2)^{8} -5(-2)^{2}+6(-2)-8 = -4+512-20-12-8=468

1 4 1
2014-01-11T07:58:26+07:00
F(-2) jika f(x) = 2x + 2x³ - 5x ² + 6x - 8
f(-2) jika f(x) = 2(2) + 2(2)³ - 5(2) ² + 6(2) - 8
f(-2) jika f(x) = 4-16-20+12 - 8
f(-2) jika f(x) = -28