Question

If a(a + b + c) = 45; b(a + b + c) = 75 and c(a + b + c) = 105 then find the value of a2 + b2 + c2.​

Answer 1

Answer:

A2+ab+AC=45;ab+B2+BC=75;AC+BC+c2=105

Step-by-step explanation:

add all three equations , A2+B2+c2+ab+ab+BC+AC+bc+AC=225, A2+B2+c2+2ab+2bc+2ac=225,