Quantitative Aptitude • Algebra
(a+b+c)² Formula
intermediate Level
Formula
(a+b+c)² = a² + b² + c² + 2ab + 2bc + 2ca
Explanation
Expansion of square of three terms.
Example
(1+2+3)² = 1 + 4 + 9 + 4 + 12 + 6 = 36
Quick Trick & Mnemonic
MNEMONIC: 'Three squares + three products' - All three individual squares, then pairs of products.