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a.) 10(2y - 10) = 20y - 100
b.) (x+5)(5x-1) = 5x² - x + 25x - 5 = 5x² + 24x - 5
c.) (7-2x)(2x-7) = 14x - 49 - 4x² + 14x = -4x² + 28x - 49 = -(4x² - 28x + 49)
Semoga membantu
b)5xkuadrat -x+25x-5
=5xkuadrat +24x-5
c)14x-49-4xkuadrat+14
=-4xkuadrat+14-35