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KiRa [710]
3 years ago
14

What is the perimeter of the triangle?

Mathematics
2 answers:
rosijanka [135]3 years ago
6 0
<h2>Given :- </h2>

<h3>3 sides of a triangle :-</h3>

4  {m}^{3 }  \:  + 2 {m }^{2}  \:  -  \: m \:

7 {m}^{3}  \:   - 3 {m}^{2}  +  \: 2m

4 {m}^{3}  \:  + 2 \:  {m}^{2}  \:  - 2m

<h2>Therefore ,</h2><h3>perimeter of triangle is sum of all sides :-</h3>

= (4 {m}^{3}  + 2 {m}^{2}  - m) + (7 {m}^{3}  - 3 {m}^{2} 2m) + (4 {m}^{3}  + 2 {m}^{2}  - 2m)

= 4 {m}^{3}  + 7 {m}^{3}  + 4 {m}^{3}  + 2 {m}^{2}  - 3 {m}^{2}  + 2 {m}^{2}  - m + 2m -2m

▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂

<h2> Hence , your answer is </h2>

\huge\green{15 {m}^{3}  +  {m}^{2}  - m}

mestny [16]3 years ago
3 0

Answer:

D

Step-by-step explanation:

When you add up

(4m^3+2m^2-m)+(4m^2+2m^2-2m)+(7m^3-3m^2+2m),

you have 15m^3+m^2-m,

which is what D is.

Side note:

You only add up the exponents when you multiply.

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