if 4x-3y=15 and xy=3, find the value of 16x^2+9y^2.
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1
Here is the answer.
Hope it helps:-)
Hope it helps:-)
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SomeshMishra:
Sorry for my wrong answer.
it's okey. better luck next time.
Answered by
1
4x - 3y = 15
take square both sides,
(4x - 3y)² = (15)²
16x² + 9y² - 24xy = 225
16x² + 9y² - 24× 3 = 225 { xy = 3
16x² + 9y² = 225 + 72
16x² + 9y² = 297
take square both sides,
(4x - 3y)² = (15)²
16x² + 9y² - 24xy = 225
16x² + 9y² - 24× 3 = 225 { xy = 3
16x² + 9y² = 225 + 72
16x² + 9y² = 297
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