Question

(7+√7)(7-√7)equals to?​

Answer 1

42

Step-by-step explanation:

(7+√7)(7-√7)

${7}^{2} - ( \sqrt{7} )^{2} = 49 - 7$

= 42

Answer 2

Use the formulae of (a+b)(a-b)= a^2-b^2

(7^2- root7^2)
// cut root with square//
14-7
7