solve x+y=12 x(x) +y(y) =74
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Answer:
x=7,y=5
Step-by-step explanation:
sobs
(x+y)²=144
x²+y²+2xy=144
we know x²+y²=74
74+2xy=144
2xy=70
xy=35
then x²+y²-2xy =(x-y) ²
74-2(35)=4
(x-y) ²=4
x-y=2
then we can get x and y by using x+y and x-y
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