(5x + 2y )² + ( 5x -2y)²
Answers
Answered by
8
Answer:
( 5x+2y+5x-2y)²- 2(25x²-4y²)
=> (10x)²-2(25x²-4y²)
=> 100x²-50x²+8y²
=> 50x²+8y²
=> ans.
Answered by
1
Answer:
2( 25x² + 4y² )
Step-by-step explanation:
(5x + 2y )² + ( 5x -2y)²
Using the identity,
(a + b)² = a² + b² + 2ab and,
(a - b)² = a² + b² - 2ab
We get,
[ (5x)² + (2y)² + 2 × 5x × 2y ] + [ (5x)² + (2y)² - 2 × 5x × 2y ]
25x² + 4y² + 20xy + 25x² + 4y² - 20xy
50x² + 8y²
2( 25x² + 4y² )
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