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7(X2 + X + 2) - 2(X2 - 3X - 5)
=(7X2+7X+14) - (2X2-6X-10)
=5X2+13X+24
jawaban C
No 6.
3(2x-y) - 5(x-y)
=(6x-3y) - (5x-5y)
=x+2y
jawaban A