Expand the following (7x+4y)^2
Answers
Answered by
1
Step-by-step explanation:
14x²+56xy+14y²............
Answered by
2
Answer:
49x² + 16y² + 56xy
Step-by-step explanation:
This problem is in the form of (a+b)² = a² + b² + 2ab
(7x + 4y)²
= (7x)² + (4y)² + 2 (7x) (4y)
= 49x² + 16y² + 56xy
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