.13 13. Find the value of 25x2 +36y-, if (5x+6y)=21 and xy=3.14. Find the value of 64x2 +81y2, if(8x+9y)=25 and xy=3.15. Find the value of 121x2 + 144y2, if(11x +12y)= 34 and xy=2.16. Find the value of 625x2 +676y2, if 25x-26y=16 and xy=7.17. Find the value of 16x2 +64y2, if 4x - 8y=10 and ty=2.18. Find the value of 100.x2 +121 y2, if 10x-11y=-5 and xy=3.

.13 13. Find the value of 25x2 +36y-, if (5x+6y)=21 and xy=3.14. Fin

1.	.13 13. Find the value of 25x2 +36y-, if (5x+6y)=21 and xy=3.14. Find the value of 64x2 +81y2, if(8x+9y)=25 and xy=3.15. Find the value of 121x2 + 144y2, if(11x +12y)= 34 and xy=2.16. Find the value of 625x2 +676y2, if 25x-26y=16 and xy=7.17. Find the value of 16x2 +64y2, if 4x - 8y=10 and ty=2.18. Find the value of 100.x2 +121 y2, if 10x-11y=-5 and xy=3.
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