Question

Bentuk sederhana dari :
(x² + 10x -25)²-(x² - 10x + 25)²

Mohon dibantu kak,butuh cepat,buat bahan ulangan besok!
pakai cara ya kak!

Answer 1

pakai rumus

a²- b²= (a-b)(a+b)

a =x² + 10x -25

b =x² - 10x + 25

a + b = (x² + 10x -25) + (x² - 10x + 25) = 2x²

a-b=((x² + 10x -25)-(x² - 10x + 25)= 20x -50

(x² + 10x -25)²-(x² - 10x + 25)²=  2x²(20x -50) = 40x³-100x²

Answer 2

(x² + 10x -25)²-(x² - 10x + 25)²
= (20x-50) 2x²
= 20x² ( 2x-5)
= 40x³ - 100x²