x+5y=9 and xy=4 find x^2+25y^2
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Answered by
1
x²+25y²= (x+5y)²-2xy= 9²-2×4= 81-8= 73
sumo2:
ur ans is incorrect
(x+5y)^2-2x.5y= 81-10.4=41
It will be (x+5y)^2 - 10xy = 81-40 = 41
I also did the same
u did 10xy and I wrote 2x .5y ...means 10xy
oh yes i didn't notice the 5 in 5y. thanks for the rectification.
☺okk
:)
Answered by
0
the answer will be 41.
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too huge method ...simply put it into the formula
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