Question

Verify the formula (a+b+c)^2 and write the steps in 70 words

Answer 1

(a+b+c)²

= (a+b+c) × (a+b+c)

= a(a+b+c) +b(a+b+c) + c(a+b+c)

= a² + ab+ ac +ab +b²+ bc +ac + bc + c²

= a² + b² + c² +2ab +2bc + 2ac