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2(x2−2x−35)
2(x−7)(x+5)
2x2 - 24x + 70 = 2 • (x2 - 12x + 35)
x2 - 12x + 35
1 • 35 = 35
-35 + -1 = -36 -7 + -5 = -12
x2 - 7x - 5x - 35
x • (x-7)
5 • (x-7)
(x-5) • (x-7)
resultado: 2 • (x - 5) • (x - 7)