Answer:
-2
Step-by-step explanation:
a^2-b^2
by use it
5-7
formula :
(a+b)(a-b) =a^2 -b^2
(5+√7)(5-√7)
=5^2 -(√7)^2
=25 - 7
=18
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Answers & Comments
Answer:
-2
Step-by-step explanation:
a^2-b^2
by use it
5-7
-2
formula :
(a+b)(a-b) =a^2 -b^2
(5+√7)(5-√7)
=5^2 -(√7)^2
=25 - 7
=18