anonymous one year ago Simplify: (4b + 3) (2b - 5) a: 8b2 - 14b - 15 b: 8b2 + 9b - 15 c: 8b2 + 6b + 15 d: 8b2 - 15

1. anonymous

what do you think u should do?

2. anonymous

multiply 4b and 2b

3. anonymous

Correct!

4. anonymous

you need to apply the FOIL/distribution method

5. anonymous

6. anonymous

i don't know FOIL

7. anonymous

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8. anonymous

first multiply this

9. anonymous

4b * 2b = ? 4b * -5 = ?

10. anonymous

8b-20b

11. anonymous

correct

12. anonymous

ok

13. anonymous

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14. anonymous

Now this… what is 3 * 2b? What is 3 * -5? And that is FOIL

15. anonymous

6b-15

16. anonymous

First Outer Inner Last

17. anonymous

ok i'll try and remember that

18. anonymous

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19. anonymous

combine like terms and you're done!

20. anonymous

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21. anonymous

but that's not an answer choose

22. anonymous

ok

23. anonymous

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24. anonymous

25. anonymous

thanks

26. anonymous

Which makes: 8b^2 - 20b + 6b - 15 8b^2 - 14b - 15

27. anonymous

Correct.