Question

If a2 + b2 + c2 = 125 and ab + bc + ca = 50, find a + b + c.​

Answer 1

Step-by-step explanation:

( A+B+C} ^2 =A2+B2+C2+2(AB+BC+CA}

rhs = 125 +2( 50}

RHS = 225

(a+B+C] = ROOt under 225

a+b+c = +15,-15

This might help you

Answer 2

+15 or -15..

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