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VARVARA [1.3K]
3 years ago
11

What is the answer to this equation?

Mathematics
1 answer:
Bezzdna [24]3 years ago
6 0
19c is the correct answer
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Factorize the following expression ab-a-b+1
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Group 'em together

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Notice that there will be a 1 as without it it'll simply be  ab

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Notice that it doesn't match with the upper one... so we'll change the signs

1 ( 1 − b ) = − 1 ( b− 1 )

(try to multiply them now!!

Jot them down in one expression

a ( b − 1 ) − 1 ( b − 1 )

You get!!!!!!

( a − 1 ) ( b − 1 )

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