Question

let us factorise x cube + y cube minus 12 X Y + 64​

Answer 1

Answer:

How do you find the value of x3+y3−12xy+64 when x+y=−4?

Precalculus

Explanation:

We know that

x3+y3x+y=x2−xy+y2 then

x3+y3=−4(x2−xy+y2) then

x3+y3−12xy+64=−4(x2−xy+y2)−12xy+64=

−4(x+y−4)(4+x+y)=0