Question

a(a-b)+b(a-b) ?
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Answer 1

Answer:

a² - b²

Step-by-step explanation:

a(a-b) + b(a-b)

= (a-b) (a+b)

= a² - b²

Answer 2

Answer:

$a {}^{2} - b {}^{2}$

Step-by-step explanation:

opening brackets we get

a^2-ab+ab-b^2

hence -ab and +ab will cancel out to give

the ans

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