Find trusted answers to your questions with the help of IDNLearn.com's knowledgeable community. Ask your questions and receive reliable and comprehensive answers from our dedicated community of professionals.

Choose the correct answer.

Which expression is equivalent to the given expression?

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

A. [tex]\[16y - 6\][/tex]

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

C. [tex]\[6y^2 + 11y + 18\][/tex]

D. [tex]\[9y - 37\][/tex]


Sagot :

Certainly! Let's go through a detailed, step-by-step solution to find the expression equivalent to:

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

### Step 1: Expand the First Term

First, we need to expand the product [tex]\((3y - 4)(2y + 7)\)[/tex].

[tex]\[ (3y - 4)(2y + 7) = (3y \cdot 2y) + (3y \cdot 7) + (-4 \cdot 2y) + (-4 \cdot 7) \][/tex]

Calculating each term:

[tex]\[ (3y \cdot 2y) = 6y^2 \][/tex]

[tex]\[ (3y \cdot 7) = 21y \][/tex]

[tex]\[ (-4 \cdot 2y) = -8y \][/tex]

[tex]\[ (-4 \cdot 7) = -28 \][/tex]

Combining these, we get:

[tex]\[ 6y^2 + 21y - 8y - 28 = 6y^2 + 13y - 28 \][/tex]

### Step 2: Add the Remaining Terms

Now, add [tex]\(11y - 9\)[/tex] to the expanded expression:

[tex]\[ 6y^2 + 13y - 28 + 11y - 9 \][/tex]

Combine like terms:

[tex]\[ 6y^2 + (13y + 11y) - 28 - 9 = 6y^2 + 24y - 37 \][/tex]

### Step 3: Compare to Given Options

We have simplified the given expression to:

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

Now we compare this with the given options:
- A. [tex]\(16y - 6\)[/tex]
- B. [tex]\(6y^2 + 24y - 37\)[/tex]
- C. [tex]\(6y^2 + 11y + 18\)[/tex]
- D. [tex]\(9y - 37\)[/tex]

The simplified expression [tex]\(6y^2 + 24y - 37\)[/tex] matches option B.

### Conclusion

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

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

Therefore, the correct answer is:

[tex]\[ \boxed{B} \][/tex]