Question

Write the equivalent of (a+root b) (a-root b)
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Answer 1

Answer:

+a root

Step-by-step explanation:

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Answer 2

Answer:

The equivalent expression of (a+√b) (a-√b)  is a² - b

Step-by-step explanation:

Given expression is (a+√b) (a-√b)

To find the equivalent expression of the given expression

Recall the formula

(a+b) (a-b) = a² - b² ------------(1)

(√b)² = b ------------(2)

Solution:

Applying the formula (1) by substituting b as √b we get,

(a+√b) (a-√b) =  a² - (√b)²

From equation (2) we get

a² - (√b)² = a² - b

(a+√b) (a-√b)  =  a² - b

∴ The equivalent expression of (a+√b) (a-√b)  is a² - b

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