Question

1.
If (3x - 5y) = 10 and xy = 5, then find the value of 9x²+ 25y².​

Answer 1

Answer:

If 3x + 5y = 11 and xy = 2, find the value of 9x2 + 25y2

Answer 2

Step-by-step explanation:

given-

(3x - 5y) = 10

xy = 5

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To Find-

9x²+ 25y².

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solution-

identity used-

(a-b)²= a²+b²-2ab

(3x - 5y) ²= 9x²+ 25y² - 2 x Xy

putting the given value

10²= 9x²+ 25y²- 2 x 5

9x²+ 25y²= 100+10

9x²+ 25y²= 110

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