Find the best answers to your questions with the help of IDNLearn.com's expert contributors. Our experts provide timely and accurate responses to help you navigate any topic or issue with confidence.

Select the correct answer.

Which expression is equivalent to the given expression?

[tex](3y - 4)(2y + 7) + 11y - 9[/tex]

A. [tex]9y - 37[/tex]

B. [tex]6y^2 + 11y + 19[/tex]

C. [tex]16y - 6[/tex]

D. [tex]6y^2 + 24y - 37[/tex]


Sagot :

To determine which expression is equivalent to the given expression [tex]\((3y - 4)(2y + 7) + 11y - 9\)[/tex], let's go through the process of expanding and simplifying it step-by-step:

1. Distribute [tex]\((3y - 4)\)[/tex] across [tex]\((2y + 7)\)[/tex]:
[tex]\[ (3y - 4)(2y + 7) = (3y \cdot 2y) + (3y \cdot 7) + (-4 \cdot 2y) + (-4 \cdot 7) \][/tex]
This simplifies to:
[tex]\[ (3y \cdot 2y) + (3y \cdot 7) + (-4 \cdot 2y) + (-4 \cdot 7) = 6y^2 + 21y - 8y - 28 \][/tex]

2. Combine like terms within the result:
[tex]\[ 6y^2 + 21y - 8y - 28 = 6y^2 + 13y - 28 \][/tex]

3. Add the remaining terms [tex]\(11y - 9\)[/tex] to the simplified expression:
[tex]\[ 6y^2 + 13y - 28 + 11y - 9 \][/tex]

4. Combine like terms again:
[tex]\[ 6y^2 + (13y + 11y) - 28 - 9 = 6y^2 + 24y - 37 \][/tex]

Therefore, the expression equivalent to [tex]\((3y - 4)(2y + 7) + 11y - 9\)[/tex] is:

[tex]\[ 6y^2 + 24y - 37 \][/tex]

The correct answer is:
[tex]\[ \boxed{D. \ 6y^2 + 24y - 37} \][/tex]