Factories:25(2x+y)²-16(x-y)² – InterviewSolution

1.

Factories:25(2x+y)²-16(x-y)²

Answer»

Answer:

84x² + 9y² + 132xy is the answer

Step-by-step explanation:

25(2x+y)²-16(x-y)²

= 25(4x² + y² +4XY ) -16(x² + y² -2XY)

= 100x² + 25y² + 100xy - (16x² + 16y² - 32xy)

= 100x² + 25y² + 100xy - 16x² - 16y² + 32xy

= 84x² + 9y² + 132xy

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