Пошаговое объяснение:
(x+13)*(x-3)
x(x-3)+13(x-3)
x²-3x +13(x-3)
x²-3x+13(x-3)
x²-3x+13x-39
x²+10x-39
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Пошаговое объяснение:
(x+13)*(x-3)
x(x-3)+13(x-3)
x(x-3)+13(x-3)
x²-3x +13(x-3)
x²-3x+13(x-3)
x²-3x+13x-39
x²-3x+13x-39
x²+10x-39