Question

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Х²+17х-18. 5х²-13х-6

Answer 1

x²+17x=18 = x²+18x-x-18 = x*(x+18)-(x+18) = (x+18)*(x-1)

5х²-13х-6 = 5х²+2x-15x-6 = x+(5x+2)-3(5x+2) = (5x+2)*(x-3)