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2 October, 15:48

What is the product of (-a + 3) (a + 4) ?

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  1. 2 October, 15:59
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    Step-by-step explanation:

    multiply the first bracket with the second

    and get - a squared - 4a+3a+12

    then we group like and unlike terms

    so - 4a+3a = - a

    our new equation will be - a (squared) - a+12=0

    we equals to zero to remove negative signs and it will be

    a squared + a-12

    then we find the factors.

    And our factors are 3a-4a

    =a squared + 3a-4a-12=0

    We factorise and answer will be

    (a+3) (a-4) = 0

    so a = - 3 or 4
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