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If a2 + b2 + c2 = 250 and ab + bc + ca = 3, then a + b + c is

Mathematics
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shayan use here the formula of (a+b+c)^2 this would help
follow suggestion by waheedahmed and answer should become abvious
thanks a lot 16 ans

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Other answers:

or -16?
Area of triangle, having sides as 8, 11 and the perimeter 32 is
(a + b + c)^2= a^2 + b^2 + c^2 + 2(ab + bc + ca), since, a^2 + b^2 + c^2 = 250 and ab + bc + ca = 3, (a + b + c)^2 = 250 + 2(3) = 256 = 16^2 therefore: a + b + c = 16 ,.
why not -16?
Area of triangle, having sides as 8, 11 and the perimeter 32 is
area is always taken positive shayanreloaded thats why...
lol these are 2 dif qs
i have given u the answer of above shayan
not the second one
for first -16 is possible right? and help wid 2nd
you had asked why not -16 for that
no area cant be -16 shayan
this is fr 1st question which is not bout area
ok my mistake both 16 and -16 are possible sorry about that shayan ...i hope u would understand
yeah i do now 2nd ques lol
do you know the formula for perimeter shayan the solution is in it
hm add sides?
3rd side is 13 i dont think i rem. herons formula
after getting third side u will find s=a+b+c/2
16 ok
16 is the answer
now use this A=squareroot(s(s-a)(s-b)(s-c)
did u get the answer shayan
43.8?

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