Question

Evaluate (2x+5) (2x - y) (4x² + y2)​

Answer 1

Answer:

(x+a)(x-b)=x²-(a+b)x-ab

(2x+5)(2x-y)

=(2x)²-2xy+10x-5y

=4x²-2xy+10x-5y

now,(4x²-2xy+10x-5y)(4x²+y²)

=4x²(4x²-2xy+10x-5y)+y²(4x²-2xy+10x-5y)

=16x^4-8x³y+40x³-20x²y+4x²y²-2xy³+10xy²-5y³

hoping for help