Question

Use Pascal's Triangle to expand (2x + y)4

1.) 16x^4 – 32x^3y + 24x^2y^2 – 8xy^3 + y^4

2.) 16x^4 + 32x^3y + 24x^2y^2 + 8xy^3 + y^4

3.) 16x^4 + 64x^3y + 48x^2y^2 + 16xy^3 + y^4

4.) 16x^4 – 64x^3y + 48x^2y^2 – 16xy^3 + y^4