Question

simply:(√3+√7)(√3-√7)​

Answer 1

formula :

(a+b)(a-b) = a^2 - b^2

(√3+√7)(√3-√7)

=(√3)^2 - (√7)^2

= 3 - 7

= -4

(√3+√7)(√3-√7)= -4

Answer 2

Root 3 s urae -root 7 square = 3-7 = -4