Question

Choose the correct simplification of the expression (7x − 3)(4x2 − 3x − 6).

28x3 − 33x2 − 33x − 18
28x3 + 33x2 − 33x + 18
28x3 − 51x2 − 33x + 18
28x3 − 33x2 − 33x + 18

Answer 1

@iGreen @brina15

Answer 2

I'm helping you now give me two seconds.

Answer 3

Just multiply the two expressions together.

Answer 4

\(\sf (7x - 3) \times (4x^2 − 3x − 6)\)

Answer 5

28?

Answer 6

First work with the first term, 7x * 4x^2 and you get 28x^3. Then multiply the first term of the binomial and second term of the trinomial. so 7x * -3x what do you get? @Keigh2015

Answer 7

No, it's kind of like the last question.

Answer 8

Multiply all the terms in the first parenthesis to all the terms in the second parenthesis.

Answer 9

@iGreen let me help her I'm showing her an easy way.

Answer 10

\(\sf 7x \times 4x^2\)
\(\sf 7x \times -3x\)
\(\sf 7x \times -6\)

\(\sf -3 \times 4x^2\)
\(\sf -3 \times -3x\)
\(\sf -3 \times -6\)

Answer 11

Alright @alexistheking777

Answer 12

@Keigh2015 You see what iGreen posted? Give me the answers to the problems he posted. It is part of the equation and will help you.

Answer 13

ok hold on

Answer 14

Yeah, after you find those just combine any like terms and you're done..

Answer 15

Have you got your answers?

Answer 16

almost

Answer 17

In this order
28x^2
-21x
-42x
-12x^2
9x
18

Answer 18

Your right for all the ones except the first two. The numbers are right but you forgot to combine the exponents so think of x^2 * x as x^2+1 since x has the exponential value of 1. So you would get an exponential value of 3. So it would be 28x^3. And same goes for x * x so it would be x^1+1 which is 2. So it should be -21x^2.
28x^3
-21x^2
-42x
-12x^2
9x
18
Now combine like terms (that is terms with same exponent. So what is -21x^2 + (-12x^2)

Answer 19

@Keigh2015

Answer 20

28x^3-33x^2

Answer 21

Yes because 28x^3 is the only term with an exponential value of 3 and -21 + (-12) is like -21 - 12 which is 33. Then you replace the x and exponential value so its -33x^2. Good job, now we can eliminate answe C since the second term is 51x^2 which is wrong. So now what is -42x + 9x?

Answer 22

-33x

Answer 23

By the way we can also eliminate B as well since the second term is positive and ours is negative. And yes it is -33x. Last step is to add the 18 to your equation so combine all those answers you just gave me.

Answer 24

28x^3-33x^2-33x+18

Answer 25

Correct so when you look at the answers the only one that matches it is D. I hope this helped you don't forget to close this question and choose the person that was the greatest help to you by hitting best response and have a wonderful day. @Keigh2015

Answer 26

thank you for the help and you too @alexistheking777

Answer 27

No problem.