Step-1

Title: Adding and subtracting polynomials

Grade: 8-b Lesson: S1-L1

Explanation: Hello Students, time to practice and review the steps for the problem.

Discussion: Step1 Step2 Step3 Step4 Step5

Lesson Steps

Step Type Explanation Answer

1

Problem

Simplify \$(3q^2 - 2q + 5) + (4q^2 + 3q - 1)\$.

2

Step

The given expressions are

\$(3q^2 - 2q + 5) + (4q^2 + 3q - 1)\$

3

Step

Combine like terms with \$q^2\$:

\$3q^2 + 4q^2 = 7q^2\$

4

Step

Combine like terms with q:

-2q + 3q = q

5

Step

Constant terms:

5 -1 = 4

6

Step

Therefore, the simplified expression is:

\$7q^2 + q + 4\$

7

Step

So, \$7q^2 + q + 4\$ is the simplified form of \$(3q^2 - 2q + 5) + (4q^2 + 3q - 1)\$.

8

Choice.A

This does not match our simplified expression. The coefficients and constants are incorrect

\$q^2 + q - 4\$

9

Choice.B

Correct: The expression is accurately simplified

\$7q^2 + q + 4\$

10

Choice.C

This does not match our simplified expression. The coefficients of \$q^2\$ and q are incorrect

\$q^2 - q + 4\$

11

Choice.D

The term involving q in option D is −q, but our simplified expression has +q instead. Therefore, option D is wrong

\$7q^2 - q + 4\$

12

Answer

Option

B

13

Sumup

Can you summarize what you’ve understood in the above steps?

Discussion: Step1 Step2 Step3 Step4 Step5


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