Tentukan nilai dari( 5x +2y - 2)(7x-7y) Tolong di bantu dgn cara

Mapel : Matematika
Bab : Aljabar

(5x + 2y - 2)(7x - 7y)
= 5x(7x - 7y) + 2y(7x - 7y) - 2(7x - 7y)
= 35x² - 35xy + 14xy - 14y² - 14x + 14y
= 35x² - 21xy - 14y² - 14x + 14y

Kata kunci : perkalian aljabar
Mapel : matematika

=> (5x +2y -2) (7x -7y)
=>5x(7x-7y) +2y(7x-7y) -2(7x-7y)
=>35x^2 - 35xy + 14xy - 14y^2 - 14x + 14y
=>35x^2 - 35xy + 14xy - 14y^2 - 14x + 14y
=> 35x^2 - 21xy - 14y^2 - 14x + 14y

^_^