Question

If 3x+4y =5 and xy=1 then find the value of 9x² + 16x²

Answer 1

Step-by-step explanation:

3x+4y=5

(3x+4y)²=5²

9x²+16y²+2.3x.4y=25

9x²+16y²+24xy=25

9x²+16y²+24×1=25

9x²+16y²+24=25

9x²+16y²=1

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Answer 2

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