Question

Factor: (y - 4)^3 - 125

Answer 1

ok this is the difference of 2 cubes

\[(y - 4)^3 - 5^3\]

this may help

Answer 2

the general form is

\[a^3 - b^3 = (a - b)(a^2 + ab + b^2)\]

so use this for your solution

tHope this help.

Answer 3

\[(y-4)^3-125=((y-4)-5)((y-4)^2+5(y-4)+25)\\=(y-9)(y^2-8y+16+5y-20+25)=(y-4)(y^2-3y+21)\]