(a + b)^3 - ( a - b )^3
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Refer the given picture........
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(a+b)³ - (a-b) ³
=a³+b³+3a²b+3ab² - ( a³-b³-3a²b+3ab²)
=a³+b³+3a²b+3ab²-a³+b³+3a²b-3ab²
=2b³+6a²b
=2b( b²+ 3a²)
=a³+b³+3a²b+3ab² - ( a³-b³-3a²b+3ab²)
=a³+b³+3a²b+3ab²-a³+b³+3a²b-3ab²
=2b³+6a²b
=2b( b²+ 3a²)
AJWA:
thnks a lot
i needed it vry much
Wlcm:-)
thnks
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