a plus b whole square minus a cube plus b cube
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(a+b)²-(a+b)³=
a²+2ab+b²-(a³+b³+2a²b+2ab²)
= a²+2ab+b²-a³-b³-2a²b-2ab²
=
I hope something help u
a²+2ab+b²-(a³+b³+2a²b+2ab²)
= a²+2ab+b²-a³-b³-2a²b-2ab²
=
I hope something help u
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