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= 6a-4a-2ab+2ab+7b-3b
=2a+4b
b. (2x kuadrat-5xy+2y kuadrat)+(-x kuadrat+7xy-3y kuadrat)
=2x kuadrat-x kuadrat-5xy+7xy+2y kuadrat-3y kuadrat
=x kuadrat+2xy-y kuadrat
6a - 4a - 2ab + 2ab + 7b - 3b
2a + 4b
b. 2x² - 5xy + 2y² - x² + 7xy - 3y²
2x² - x² - 5xy + 7xy + 2y² - 3y²
x² + 2xy - y²
maaf kalo salah