24x^2+ 20x – 84 36x^2-4x-40 9a^2-1 -show work explain a little.

Question

24x^2+ 20x – 84
36x^2-4x-40
9a^2-1

-show work
explain a little.

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Serenity 3 weeks 2021-09-25T03:20:41+00:00 1 Answer 0

Answers ( )

    0
    2021-09-25T03:21:46+00:00

    Answer:

    1. 4(2x-3)(3x+7)

    2. 4(9x-10)(x+1)

    3. (3a+1)(3a-1)

    Step-by-step explanation:

    1. Add and subtract the second term to the expression and factor by grouping.

    2. Same thing for #2 (look at #1)

    3. Since both terms are perfect squares, factor using the difference of squares formula a^(2)-b^(2)=(a+b)(a-b) where a = 3a and b = 1

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