Question

X^2 - 8x - 1280 =0. Factories

Answer 1

here is your solution.
hope it helps.

Answer 2

${x}^{2} - 8x - 1280 = 0 \\ {x}^{2} - 40x + 32x - 1280 = 0 \\ {x}(x - 40) + 32(x - 40) = 0 \\( x - 40)(x + 32) = 0 \\ x = 40 \: and x = - 32$
Hope it help you