Question

$(5 + \sqrt{7)} \times (5 - \sqrt{7)}$
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Answer 1

Answer:

18 is your answer mate

Step-by-step explanation:

We can use identity (a+b)(a-b)=a²-b²

So,

(5+√7) (5-√7)= 5²-(√7)²

Which is = 25-7=18

Answer 2

Answer:

18 is the answer of your question

Step-by-step explanation:

We can use identity (a+b)-(a-b)=a²-b²

So,

(5+√7)(5-√7)=5²-(√7)²

Solution of the above equation is 25-7=18

Hope it helps!

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