Algebra ? Multiplying Polynomials (2x-3)(4x+10)?

Question

I am getting ready for mid-term and I just want to make sure that I know how to do these. I appreciate your help and will be posting more. Our teacher said there will be some questions like these, I have gone through my book but not foresure I know what I am doing.

would I use the FOIL method?

Answer 1

Yeah, use FOIL

(2x-3)(4x+10)
8x^2 + 20x - 12x - 30
8x^2 + 8x - 30

Answer 2

Yes , use the FOIL method.

2x*4x=8x^2
-3*4x=-12x
2x*10=20x
-3*10=-30

8x^2+8x-30

Answer 3

Yes you are correct you would use the foil method.
(2x - 3)(4x + 10) using FOIL method
8x^2 + 20x - 12x - 30 now add like terms
8x^2 + 8x - 30 that is you final answer

If you need further help or clarification email me or im me. Good Luck.

Answer 4

Yes, use FOIL:

First: 2x*4x = 8x^2
Outside: 2x*10 = 20x
Inside: -3*4x = -12x
Last: -3*10 = -30

Add them: 8x^2 + 20x - 12x - 30
= 8x^2 + 8x - 30

Answer 5

to try this you utilize what's named distribution, or: The Distribution of Mulitplication throughout the time of Addition, that's: For any actual numbers a, b, and c: a * (b + c) = a*b + a*c. So, via this belongings, you're taking each term on your polynomial, and multiply them via the monomial. So for #a million, you're taking your 2 words, 2x and 3y, and multiply them the two via 3 (to get 6x and 9y) and then upload them returned mutually: 3(2x + 3y) = 6x + 9y. #3, -2a(3a+5ab) = (-2a)(3a) + (-2a)(5ab) = -6a^2 -10 a^b.

Answer 6

Yes, FOIL, 8x^2 + 8x - 30

Answer 7

Yes. Use FOIL. 8x^2 + 8x - 30

Grrrrr.....always watch your signs....damn buggers.....