Question

pls answer fast pls answer this is urgent​

Answer 1

Answer:

7z3 + 12z² - 20z

Step-by-step explanation:

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Answer 2

$\huge\rm { Question }$

$\bf\red {- {z }^{2} + 13 {z}^{2} - 5z + 7 {z}^{3} - 15z}$

$\huge\rm { Solution- }$

$\sf {\implies - z {}^{2} + 13 {z}^{2} - 5z - 15z + 7 {z}^{3} }$

[ Here, we collected all the like terms ]

$\sf {\implies 12 {z}^{2} - 20z + 7 {z}^{3}}$

[ Performing addition and substraction ]

$\sf\green { \implies 7 {z}^{3} + 12 {z}^{2} - 20z \: ans...}$

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How to simplify any algebraic expressions?

• At first collect all the like terms.

• Then add or subtract.

Let's take example-

$\sf\red { 4 {y}^{2} + 9 {z}^{3} - 3 + 2{y}^{2} - 4{z}^{3} + 7}$

Now, here we have like terms -

• $\sf\green {4 {y}^{2}}$ and $\sf\green { 2 {y}^{2} }$

• $\sf\pink {9 {z}^{3}}$ and $\sf\pink { -4 {z}^{3} }$

• $\sf\blue {-3 }$ and $\sf\blue {7}$

So, now we have to do simplification of these..( easy)

$\sf\red {4 {y}^{2} + 2 {y}^{2} + 9 {z}^{3} - 4 {z}^{3} -3 + 7}$

[ As from the given steps we collected all like terms and performed addition and substraction ]

$\sf\red { \implies 6{y}^{2} + 4{z}^{3} + 4 \: Ans.. }$

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