Chapter 5: Q. 5.3 (page 490)

Add or subtract: $(a) 12 q^{2} + 9 q^{2} (b) 8 m n^{3} - (- 5 m n^{3}) .$

Short Answer

Expert verified

The result is

$\begin{array}{l} a) 21 q^{2} \\ b) 13 m n^{3} \end{array}$

Step by step solution

Step 1. Given information

The given polynomials are

$(a) 12 q^{2} + 9 q^{2} (b) 8 m n^{3} - (- 5 m n^{3}) .$

We have to add or subtract the terms as applicable

Step 2. Solve part (a)

$\begin{array}{l} Wehave(a) 12 q^{2} + 9 q^{2} \\ Combinetheliketerms \\ \Rightarrow 12 q^{2} + 9 q^{2} = (12 + 9) q^{2} \\ = 21 q^{2} \end{array}$

Step 3. Solve part (b)

$\begin{array}{l} Wehave(b) 8 m n^{3} - (- 5 m n^{3}) . \\ Combinetheliketerms \\ \Rightarrow 8 m n^{3} - (- 5 m n^{3}) = (8 + 5) m n^{3} \\ = 13 m n^{3} \end{array}$

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Add or subtract: $(a) 12 q^{2} + 9 q^{2} (b) 8 m n^{3} - (- 5 m n^{3}) .$

Short Answer

Step by step solution

Step 1. Given information

Step 2. Solve part (a)

Step 3. Solve part (b)

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Add or subtract:(a)12q2+9q2(b)8mn3--5mn3.

Short Answer

Step by step solution

Step 1. Given information

Step 2. Solve part (a)

Step 3. Solve part (b)

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Geometry

Pure Maths

Discrete Mathematics

Probability and Statistics

Theoretical and Mathematical Physics

Calculus

Study anywhere. Anytime. Across all devices.

Add or subtract: $(a) 12 q^{2} + 9 q^{2} (b) 8 m n^{3} - (- 5 m n^{3}) .$