if X + Y is equal to 12 X Y is equal to 13 find the value of x square + Y square
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x+y =13. ...(i)
12xy=13
=>XY=13. ...(ii)
(x+y)²=x²+y²+2xy
=>x²+y²=(x²+y²)-2xy
=13²-2×13
=169-26
=143
12xy=13
=>XY=13. ...(ii)
(x+y)²=x²+y²+2xy
=>x²+y²=(x²+y²)-2xy
=13²-2×13
=169-26
=143
aditya17072004:
hope it helps you
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