Question

Please answer quickly

Answer 1

10.
${x}^{2} (2x - 4) - 1(2x - 4) \\ (2x - 4)( {x}^{2} - 1)$
9. assuming them a,b,c
${a}^{3} + {b}^{3} + {c}^{3} = {(a + b + c)}^{3} \\ - 3 (a + b )(b+ c)(c + a)$
apply the formula
=(0)-3(-7b+9c)(-5a+7b)(-9c+5a)
=3(7b-9c)(7b-5a)(5a-9c) ans