(a + √b) (a - √b) is equal to
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The correct answer is a2 - b it means (a) raised to the power 2 and we will subtract b from it.
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(a+√b) (a-√b)
a²-a√b+a√b-√b²
-a√b and a√b gets canceled
√b² =b
So,
(a+√b) (a-√b)=a²-b
Therefore, (a+√b) (a-√b) is equal to a²-b.
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