Question 347867
<pre>
10x+15yz

5 goes into 10 2 times, and into 15 3 times, so factor it in front of a parentheses

5(2x+3yz)

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3y<font color="red">(4-y)</font>+6x<font color = "red">(4-y)</font>

Take out the red factor in front just like we took 5 out of
the first problem:

<font color = "red">(4-y)</font>(3y+6x)

Then 3 goes into 3 1 time and 3 goes into 6 2 times so now in the
end we have:

<font color = "red">(4-y)</font>3(y+2x)

But it's customary to put the shortest factor first, so move 
the 3 out front:

3<font color = "red">(4-y)</font>(y+2x)

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2a-6-2a^2+3b^2

That doesn't factor.

Edwin</pre>