Question

LAST 2 PLEASE HELP, simplify the product using a table.

8. (5h + 4)(3h + 6)


__________
3h | 6
__________
5h
_________
4

A. 15h2 + 42h + 24
B. 15h2 – 42h + 24
C. 15h2 + 18h – 24
D. 15h2 – 18h – 24



9. (–2h + 4)(5h + 7)

_______
5h 7
_______
-2h
________
4


A. –10h2 + 34h – 28
B. –10h2 + 6h + 28
C. –10h2 – 6h + 28
D. –10h2 – 34h – 28

Answer 1

i think 8 is D and 9 is D?

Answer 2

\[(5h+4)(3h+6) = 5h(3h+6) + 4(3h+6) \]by distributive property of multiplication
\[15h^2+30h+12h+24 = 15h^2+42h+24\]

Answer 3

\[(-2h+4)(5h+7) = -2h(5h+7)+4(5h+7)\]Using the same approach, what does that give you?

Answer 4

// i don't understand why you need a table, but this is how i did it.
(5h + 4)(3h + 6)

(5h*3h)+(4*3h)+(5h*6)+(4*6)

15h^2+12h+30h+24

15h^2+42h+24

Answer 5

thank you guys! help with 9?

Answer 6

Yeah, I was a bit puzzled by the table approach, too. Maybe if we saw the text it would be clearer...

Answer 7

I showed you what to do with 9...continue the work and tell us what you get...

Answer 8

@whpalmer4 you both commented at the same time i didmt realize yours was for #9, thank you!

Answer 9

Okay, now you know, what's the answer? :-)

Answer 10

is it b/:

Answer 11

@whpalmer4

Answer 12

If you multiply it out correctly, you won't have to ask. Multiply it out and tell me what you get.

Answer 13

Actually writing it out is productive...

Answer 14

c(:

Answer 15

Is that an emoticon, or an answer choice?

\[(-2h+4)(5h+7) = -2h(5h+7)+4(5h+7) = \]
\[-2h(5h) -2h(7)+4(5h) + 4(7) = -10h^2-14h+20h+28 =\]\[-10h^2+(20-14)h+28=-10h^2+6h+28\]

Answer 16

c is my answer lol!

Answer 17

Can you point out the mistake I made, then? :-)

Answer 18

i don't think you did. i suck at math so im probably wrong!