If x+y=12 and xy=9,find the value of (x²+y²).
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Answered by
2
Answer:
Step-by-step explanation:
x+y=12 ,
(x+y)²=12² ( squaring both side ) ,
x²+y²+2xy=144 ,
x²+y²+2(14)=144 (xy=14) ,
x²+y²=144-28 ,
x²+y²=116.
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Answered by
0
Answer:
X^2+Y^2=(x+y)^2+2xy
12^2+2(9)
144+18
162
Step-by-step explanation:
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