Question

Tentukan hasil perpangkatan dari (a+b-3)²
pakai caranya!

Answer 1

((a + b) - 3)²
= (a + b)² - 2(3)(a + b) + 9
= a² + 2ab + b² - 6a - 6b + 9

Answer 2

(a + b - 3) ( a + b - 3)
(a)(a) + (a)(b) + (a)(-3) + (b)(a) + (b)(b) + (b)(-3) + (-3)(a) + ( -3)(b) + (-3)(-3)
a² + ab - 3a + ab + b² - 3b - 3a - 3b + 9
a² + b² + 2ab - 6a - 6b + 9