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Notice that -4 and can both have 4 divided into them and you still have a whole number.

So you can "pull out" the 4:

4( -1 - 12/4 a) = 4 ( -1 - 3a) and if you want you can grab the negative while you're at it:

-4-12a = -4 (1 + 3a) remember to change that sign inside.

Q: How do you factorise -4 -12a?

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The GCF is 4.

If you mean: 12a+14a-4 then it can be simplified to 26a-4

12a + 4 - 10a = 2a + 4 or 2*(a + 2)

4(x2 + 4)

2(3n+4)

It multiplies out as: 12a-12+2 = 12a-10

4

4(x+6)

(a + 6)(a + 4)

12a = 48 Divide both sides by 12 to find the value of a: a = 4

2x2 - 9x + 4 = (2x - 1)(x - 4)

X2 + 4xx(x + 4)=======