Question

Check my work please?

1. (2x+5) (3x+7) I got : 35x^3+35

2. (-8a^3 b^4)^2 I got: 64a^6 b^8

Answer 1

not quite....try it again....remember

2x * 3x = ?
2x * 7 = ?
5 * 3x = ?
5 * 7 = ?

same thing for the second one

Answer 2

First is incorrect, second is correct.

Answer 3

For the first one, remember that you have to multiply each component of the second term by each component of the first term.

\[(a+b)(c+d) = a*c + a*d + b*c + b*d\]

Answer 4

wouldnt I just combine like terms?

Answer 5

I got 6x+14x+15x+35

Answer 6

\[2x*3x \ne 6x\]

Answer 7

still a bit confused

Answer 8

6x^2 ?

Answer 9

6x^2+39x +35

is that right?

Answer 10

Getting closer... :-)

Answer 11

VERY close...1 more time

Answer 12

\[(2x+5)(3x+7) = 2x*3x + 2x*7 + 5*3x + 5*7 = \]

Answer 13

39x^2

Answer 14

\[2x*3x = \]\[2x*7=\]\[5*3x=\]\[5*7=35\] (I did the last one for you :-))

Answer 15

lets do it the step by step

2x * 3x is?
2x * 7 is?
5 * 3x is?
5 * 7 is?

Answer 16

6x^2......14x.....15x.....35

Answer 17

RIGHT

so

6x² + 14x + 15x + 35

what is your final answer?

Answer 18

6x^2 +29x+35

Answer 19

There you go! :)

Answer 20

i feel so supid when it comes to math lol. thanks both of you

Answer 21

lol, just try to break questions down into steps...makes it a lot easier :) and no problem!

Answer 22

Yeah, simple steps, done methodically, attention to detail...