## mikaa_toxica13 2 years ago Identify the factors of x2 − 4x − 12. (x + 4)(x − 3) (x − 4)(x + 3) (x − 2)(x + 6) (x + 2)(x − 6)

1. skullpatrol

Any ideas?

2. mikaa_toxica13

D ?

3. skullpatrol

Why?

4. mikaa_toxica13

well i asked my teacher and she was it was the answer.

5. mikaa_toxica13

shes not good at explaining though

6. skullpatrol

Hmm..

7. skullpatrol

Let's do it together: Multiply the first terms of the binomials, what do you get?

8. mikaa_toxica13

the binomials are 2 and 4 right ? or by terms u mean x and y ?

9. skullpatrol

\$\$(x + 2)\$\$is one binomial and\$\$(x − 6)\$\$is another binomial. Each of x, 2 and -6 are called terms.

10. skullpatrol

A monomial is an expression that is either a numeral, a variable or the product of a numeral and one or more variables.

11. skullpatrol

In the expression a + b a and b are called terms

12. mikaa_toxica13

oh okay thank u :) so then what ?

13. skullpatrol

Multiply the first terms of the binomials, what do you get?

14. skullpatrol

\$\$(x + 2)(x − 6)\$\$ hmm?

15. skullpatrol

|dw:1363720290995:dw|

16. skullpatrol

Then multiply the first term of each binomial by the last term of the other and add these products.

17. mikaa_toxica13

soo sorry. i had to go offline for a while

18. skullpatrol

and finally, multiply the last terms of the binomials.

19. skullpatrol

By following these steps you will see that \$\$(x + 2)(x − 6)=x^2 − 4x − 12\$\$

20. mikaa_toxica13

oh okay. thank u !!

21. skullpatrol

np :)