Question

(a+b)/\2+(a-b)/\2 = ----------------------------

Answer 1

=> we know the formula of (a+b)² = a²+2ab ± b²

nd we know the formula of (a-b)² = a² -2ab + b²

here,

(a+b)² + (a-b)²

=> (a²+2ab ± b²) + (a² -2ab + b² )

=> a² + 2ab + b² + a² - 2ab + b²

=> a⁴ + b⁴

=> a⁴ + b⁴

hence ,

(a+b)² + (a-b)² ====> a⁴+ b⁴