Question

please explain question no. 3 i will mark you as the brainliest

Answer 1

${( {x}^{2} - 6x) }^{2} - 8( {x}^{2} - 6x + 8) - 64 \\ let \: {x }^{2} - 6x = a \\ \: then \\ {a}^{2} - 8(a + 8) - 64 \\ {a}^{2} - 8a - 64 - 64 \\ {a}^{2} - 8a - 128 \\ {a}^{2} - 16a + 8a - 128 \\ ( a - 16)(a + 8) \\ putting \: value \: of \: a \\ ( {x}^{2} - 6x - 16)( {x}^{2} - 6x + 8) \\ solving \: further \\ ( x - 8)(x + 2)(x - 4)(x - 2)$

Answer 2

(x^2-x)^2-6(x^2-x)-2(x^2-x)+12
x^2-x (x^2-x-6)-2(x^2-x-6)
(x^2-x-6)(x^2-x-2)