(2x-5y)^3-(2x+5y)^3=?
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(2x-5y)³-(2x+5y)³
= (2x)³-(5y)³-3(2x)²×(5y)+3(2x)×(5y)²-[(2x)³+(5y)³+3(2x)²×(5y)+3(2x)×(5y)²]
= 8x³-125y³-60x²y+150xy²-8x³-125y³-60x²y-150xy²
= -250y³-120x²y
= (2x)³-(5y)³-3(2x)²×(5y)+3(2x)×(5y)²-[(2x)³+(5y)³+3(2x)²×(5y)+3(2x)×(5y)²]
= 8x³-125y³-60x²y+150xy²-8x³-125y³-60x²y-150xy²
= -250y³-120x²y
vishalac01:
Thanks u for this ans
welcome
Answered by
6
Answer:(2x-5y)³-(2x+5y)³
= (2x)³-(5y)³-3(2x)²×(5y)+3(2x)×(5y)²-[(2x)³+(5y)³+3(2x)²×(5y)+3(2x)×(5y)²]
= 8x³-125y³-60x²y+150xy²-8x³-125y³-60x²y-150xy²
= -250y³-120x²y
Hope it helps
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