if x+y+z=10 ,x²+y²+z²=30 find xy+yz+zx
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(x+y+z)²=x²+y²+z²+2xy+2yx+2z
100=30 +2(xy+yx+zx)
70/2=(xy+yx+zx)
xy+yx+zx=35
100=30 +2(xy+yx+zx)
70/2=(xy+yx+zx)
xy+yx+zx=35
joel7777:
Who r u tell me
R u hehehehe
I know its for the sake of fun
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hope this will help u...
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jamshedpur, Jharkhand
your caste is Gupta and my caste is Goyal same we are baniya
no I'm not baniya
my surname is not according to my caste
your caste is gupta !?
no it's just my surname
you know what is baniya !
no
baniya is the group of people of surname gupta ,goyal,mittal ,aggarwal etc
hi
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