1.a.(2x+5)³ b.(–x+8)² c.(2x–2y)²

a. (2x + 5)^3 = (2x+5)^2 ×(2x+5) =( 4x^2 + 20x + 25) (2x+5) = 8x^3 + 20x^2 + 40x^2 + 100x + 50x + 125 = 8x^3 + 60x^2 + 150x + 125

b. (-x+8) ^2 = x^2 - 16x + 64

c. (2x-2y)^2 = 4x^2 - 8xy +4y^2