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4
Answer:
1)(a+b)(2a-3b+c)
=a(2a-3b+c)+b(2a-3b+c)
=2a²-3ab+ac+2ab-3b²+bc
=2a²-ab+ac-3b²+bc
2)(a+b+c)(a+b+ab)
=a(a+b+ab)+b(a+b+ab)+c(a+b+ab)
=a²+ab+a²b+ab+b²+ab²+ac+bc+abc
=a²+2ab+a²b+b²+ab²+ac+bc+abc
3)(a²+b²)(a+b²)
=a²(a+b²)+b²(a+b²)
=a³+a²b²+ab²+b⁴
Answered by
1
Answer:
Do your home work
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XD
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