Question

Sederhanakan !
a) 9x+6y - 10y-8x
b) x^2+8y^2 - 16 +10x^2 - 7y^2 + 11
jawab pakai cara ya!!

Answer 1

Tentukan suku-suku sejenis, lalu operasikan.

a.)
9x + 6y - 10y - 8x
= (9x - 8x) + (6y - 10y)
= (9-8)x + (6-10)y
= 1x + (-4)y
= x - 4y

b.)
x² + 8y² - 16 + 10x² - 7y² + 11
= (x² + 10x²) + (8y² - 7y²) + (-16+11)
= (1+10)x² + (8-7)y² + (-5)
= 11x² + 1y² - 5
= 11x² + y² - 5