Question

oh a²+b²+c² = 20 and ab +bc +ca =8 then what is the value of a+b+c is.​

Answer 1

$\: \huge{\underline{\mathfrak\red{❥answer❣}}}$

$\: \: \fbox\pink{Given}$

➭a²+b²+c²=20,ab+BC+AC=8

$\: \: \fbox\pink{To find}$

➭a+b+c=?

$\: \: \fbox\pink{Solution}$

➭ (a+b+c)²=a²+b²+c²+2ab+2bc+2ac

➭ (a+b+c)²=20+2(ab+BC+ac)

➭ (a+b+c)²=20+2(8)

➭ (a+b+c)²=20+16

➭ (a+b+c)=36

➭Taking square root...

➭ √(a+b+c)²=√36

➭ a+b+c=6

hope it was helpful to you