Question

I dont know how to factor a equation??

Answer 1

you should find the common factor... :)
and sometimes we do different method to factorize expression

Answer 2

I dont know how...and i hav a test in about 30 min on it and i dont know..please hel

Answer 3

It's a VERY, VERY tedious thing when you start it, but you get used to it easily.

Answer 4

Let's start with a linear expression.\[2x + 4\]I personally prefer listing down the coefficients to start with.

2,4

What is the gcd of 2 and 4?

Answer 5

Yes, it's 2.
Now, we'd be getting 2 OUT of the bracket.\[2( )\]Inside those parentheses, you have,\[2(x + 2)\]Let's learn how I got x + 2.

Answer 6

You see the coefficient and the thing outside the bracket, and divide both.
2,4
divide both by 2 for getting the coefficients of the inner thingy.
2/2, 4/2
=> 1, 2

Answer 7

ok i get it.....thanx
so.. what would this be
\[2x^2+x-15=0 \]

Answer 8

This is another method. Hmm

Answer 9

First, list down the coefficients.

2, 1, -15

Second, multiply coefficient 1 by coefficient 3.

2, 1, -15
Here, coefficient 1 * coefficient 3 = 2 * -15 = -30

Third, find two numbers such that when they are multiplied, then the product is -30 and the sum is coefficient 2(1 in this case)

Those numbers are -5 and 6 in this case because

-5 * 6 = -30

and

-5 + 6 = 1

Now, use the method known as "splitting the middle term". After splitting, you get:\[2x^2 - 5x + 6x -15\]