tentukan hasil perkalian aljabar berikut ini! a.(10-3y) (7+3y) b.(5x+6y) (5x+6y) c.(6x-9y) (6x-9y)

a)
(10 - 3y)(7 + 3y)
= (10)(7) + (10)(3y) + (-3y)(7) + (-3y)(3y)
= 70 + 30y - 21y - 9y²
= 70 + 9y - 9y²

b)
(5x + 6y)(5x + 6y)
= (5x)(5x) + (5x)(6y) + (6y)(5x) + (6y)(6y)
= 25x² + 30xy + 30xy + 36y²
= 25x² + 60xy + 36y²

c)
(6x - 9y)(6x - 9y)
=(6x)(6x) + (6x)(-9y) + (-9y)(6x) + (-9y)(-9y)
= 36x² - 54xy - 54xy + 81y²
= 36x² - 108xy + 81y²

a.(10-3y)(7+3y)
70+30y-21y-9y^2
-9y^2+9y+70

b.(5x+6y)(5x+6y)
25x^2+30xy+30xy+36y^2
25x^2+36y^2+60xy

c.(6x-9y)(6x-9y)
36x^2-54xy-54xy+81y^2
36x^2+81y^2-108xy

Semoga Membantu +__+