Quantitative Aptitude • Algebra
(a+b)² Formula
basic Level
Formula
(a+b)² = a² + 2ab + b²
Explanation
The square of sum of two numbers equals the sum of their squares plus twice their product.
Example
(3+4)² = 9 + 24 + 16 = 49
Quick Trick & Mnemonic
MNEMONIC: 'AaBbC' - First A squared, then 2aB, then B squared. Remember: middle term is always 2ab.