1) (-8-5b)^2 = (-8)^2 - 2*(-8)*5b + (5b)^2 = 64 + 80b + 25b^2
2) (3x-10y)^2 = (3x)^2 - 2*3x*10y + (10y)^2 = 9x^2 - 60xy + 100y^2
3) (11b - 2d)^2 = (11b)^2 - 2*11b*2d + (2d)^2 = 121b^2 - 44bd + 4d^2
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Answers & Comments
1) (-8-5b)^2 = (-8)^2 - 2*(-8)*5b + (5b)^2 = 64 + 80b + 25b^2
2) (3x-10y)^2 = (3x)^2 - 2*3x*10y + (10y)^2 = 9x^2 - 60xy + 100y^2
3) (11b - 2d)^2 = (11b)^2 - 2*11b*2d + (2d)^2 = 121b^2 - 44bd + 4d^2