Question

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

Answer 1

shayan use here the formula of (a+b+c)^2 this would help

Answer 2

follow suggestion by waheedahmed and answer should become abvious

Answer 3

thanks a lot 16 ans

Answer 4

or -16?

Answer 5

Area of triangle, having sides as 8, 11 and the perimeter 32 is

Answer 6

(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 ,.

Answer 7

why not -16?

Answer 8

Area of triangle, having sides as 8, 11 and the perimeter 32 is

Answer 9

area is always taken positive shayanreloaded thats why...

Answer 10

lol these are 2 dif qs

Answer 11

i have given u the answer of above shayan

Answer 12

not the second one

Answer 13

for first -16 is possible right?
and help wid 2nd

Answer 14

you had asked why not -16 for that

Answer 15

no area cant be -16 shayan

Answer 16

this is fr 1st question which is not bout area

Answer 17

ok my mistake both 16 and -16 are possible sorry about that shayan ...i hope u would understand

Answer 18

yeah i do
now 2nd ques
lol

Answer 19

do you know the formula for perimeter shayan the solution is in it

Answer 20

hm
add sides?

Answer 21

3rd side is 13 i dont think i rem. herons formula

Answer 22

after getting third side u will find s=a+b+c/2

Answer 23

16 ok

Answer 24

16 is the answer

Answer 25

now use this A=squareroot(s(s-a)(s-b)(s-c)

Answer 26

did u get the answer shayan

Answer 27

43.8?