# Grade 10 math

Expand and simplify:
-5(2x +5b)^2

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1. square the binomial first, remember BEDMAS, (E)xponents before (M)ultiplication

-5(4x^2 + 20bx + 25b^2)
= -20x^2 - 100bx - 125b^2

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posted by Reiny

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