## zahabaha 3 years ago HOW WULD U FACTOR THIS :)) 10x2 − 7x − 3

1. NotTim

Ok, what 2 numbers add to 7 and multiply to the last and first numbers?

2. zahabaha

4 and 3

3. NotTim

and multiply to 30?

4. zahabaha

um 3

5. cwrw238

you need to factor 10 and -3 and and combine them so multiplying and addingg will give -7

6. NotTim

7. zahabaha

umm idk

8. cwrw238

10 * 1 1 * -3

9. zahabaha

oh ok then wat do i do

10. cwrw238

|dw:1344725357896:dw|

11. cwrw238

the 10 * -1 and 1 * +3 so its (10x + 3)(x - 1)

12. zahabaha

can u like show me step by step under eachother without drwing

13. cwrw238

well - this is the way i do it you have to consider the possibilities 10 could factor to 5 * 2 or 10 * 1 and -3 could be 1 * -3 or -1 * 3 so you have to try out different combinations so as to obtain -7 (the middle term) thats how i got 10*1 and 1 * -3 - these factor to the form (ax + b)(cx + d) and adx + bcd is the middle term thats how the result is (10x - 3)(x + 1) the (10 * 1) + (-3 * 1) gives the -7

14. cwrw238

these are a bit tricky - and need some practice before you get proficient

15. zahabaha

8x2 − 11x + 3

16. zahabaha

how uld i factor this one