Question

Which of the following polynomials is the expansion of (1/2x-y)^4

Answer 1

Answer:

Hello :

(1/2x-y)^4 = (1/2x-y)²(1/2x-y)²

but : (1/2x-y)²= (1/2)²- 2(1/2)xy +y²

so : (1/2x-y)^4 = ((1/2)²- 2(1/2)xy +y²) ((1/2)²- 2(1/2)xy +y²) = ........

Answer 2

Answer:

1/16 x^4 - 1/2x^3y +3/2 x^2y ^ - 2 xy^3 + y^4