Question

simplify the following: (root7+root3)(root7-root2)​

Answer 1

$\huge\mathbb{SOLUTION}$

(√7+√3)(√7-√3)

= (√7)²-(√3)²

= 7 - 3

= 4

NOTE : -

a² - b² = (a+b)(a-b)

(a+b)² = a²+b²+2ab

(a-b)² = a²+b²-2ab