Multiply:
4x - 5y by 4x + 5y
Answers
Answered by
126
Multiply:
4x - 5y by 4x + 5y
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Here ,we use this identity:-
Now ,here x=4x & y = 5y
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Answered by
1
=(4x - 5y) × (4x + 5y)
=16x² + 20xy - 20xy - 25y²
=16x² - 25y²
=(4x)² - (5y)²
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