Question

jabarkan dan sederhanakan

1. (3x-2) (x-1)....
2. (x+2) (x+5)...
3. (3x-5)^3...

Answer 1

1. 3x^2 - 3x - 2x + 2 = 3x^2 - x +2
2. x^2 + 5x + 2x + 10 = x^2 + 7x + 10 
3. pakai cara segitiga pascal= 
(3x)^3 + 3(3x)^2(-5) + 3(3x)(-5)^2 + (-5)^3
= 27x^3 -135x^2 + 225x - 125