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x^(2) - 8x + 12

Write down all the pairs of factors of '12'. They are ( 1,12) , ( 2, 6) , ( 3 ,4).

Select a pair that add to '8' . Viz, ( 2,6).

Set up brackets

( x 6)(x 2)

Which signs????

Since '12' is positive (+), then both the signs are the same.

Since '8' is negative(-), then both signs are negative.

Hence

( x - 6)(x - 2)

Fully factored . Done!!!!!!

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lenpollock

Lvl 17
1w ago

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