(a+b+c)(a+b-c)
=?????
Answers
Answered by
0
Answer:
a +b+c+=d right nama OK
Answered by
2
Answer:
a²+b²-c²+2ab
Step-by-step explanation:
(a+b+c)(a+b-c)
= a(a+b-c) + b(a+b-c) + c(a+b-c)
= (aa)+(ab)-(ac) + (ba)+(bb)-(bc) + (ca)+(cb)-(cc)
= a²+b²-c² + ab+ab -bc+bc -ca+ca
= a²+b²-c² + 2ab
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