Question

F(a-1), jika f(x) = x^3 - 3x + 2
hitung dngn cara substitusi ya kaka" ..
*msh pnasaran knpa dri tdi beda jwabn mulu sma tmn :"D

Answer 1

F(x) = x³ - 3x + 2
f(a-1) = (a-1)³ - 3(a-1) + 2
         = (a-1)(a-1)(a-1) - 3a + 3 + 2
         = (a² - 2a + 1) (a-1) - 3a + 5
         = (a³ - a² - 2a² + 2a + a - 1) - 3a + 5
         = a³ - 3a² + 3a - 1 - 3a + 5
         = a³ - 3a² + 4

semoga membantu yaa :)