(7x+3y)² full answer
Answers
Answered by
1
Answer:
We know (a+b)
2
=a
2
+2ab+b
2
By using this identity, we get
(7x+3y)
2
=(7x)
2
+(3y)
2
+2×7x×3y
=49x
2
+9y
2
+42xy
Answered by
0
Answer:
(a+b)²=a²+b²+2ab
Step-by-step explanation:
(7x+3y)²=49x²+9y²+2•7x•3y
=49x²+9y²+42xy
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