Question

ME AJUDEM(2x+y)^2-(2x-y)^2

Answer 1

${(2x + y)}^{2} - {(2x - y)}^{2} = \\ = 4 {x}^{2} + 4xy + {y}^{2} - (4 {x}^{2} - 4 xy + {y}^{2}) = \\ = 4 {x}^{2} + 4xy + {y}^{2} - 4 {x}^{2} + 4xy - {y}^{2} = \\ = 8xy$