Question

(
$(5 + \sqrt{7} ) \times (5 - \sqrt{7} )$
(a+b) (a-b) = a²-b²​

Answer 1

Answer:

[5+root 7] [5-root 7]  {(a+b) (a-b) = a²-b²​}

[5]^2-[root 7]^2

25-7

18

Step-by-step explanation: