Please show me work of how to solve this problem. I've been beating myself up! Thanks.

(x+y)² =(x+y)(x+y) Then you FOIL (First, outer, inner, last)

(x+y)² =(x+y)(x+y) = xx + xy + xy + yy [and when you combine like terms] = x² + 2xy + y²

(x+y)^{3} = (x² + 2xy + y²)(x+y) Then you FOIL (First, outer, inner, last)

(x+y)3 = (x² + 2xy + y²)(x+y) = x^{2}x +2xxy + xy^{2} + x^{2}y + 2xyy + y^{2}y [and when you combine like terms] = x^{3} + 3x^{2}y+ 3xy^{2} + y^{3}

## Comments

Thank you, Kristin! How did you make exponents on the computer? I couldn't figure that out.

Use Microsoft Word and hold the control, shift, and equals key for superscript. Hold the control and equal key only for subscript.