Question

find the value of 5a2-7a-8a2+4a2

quick

Answer 1

Step-by-step explanation:

Given:5a²-7a-8a²+4a²

To find: Evaluate the polynomial

Solution:

We know that polynomial Addition and subtraction can be done only if two terms have same degree.

Here

5a²,8a² and 4a² have same degree,these can be add or subtract according to the sign present.

Thus,

write polynomial with taking similar terms altogether with their sign

=> 5a²-8a²+4a²-7a

=> -3a²+4a²-7a

=> a²-7a

or

=> a(a-7)

Final answer:

5a²-7a-8a²+4a² =a(a-7)

To learn more on brainly:

Refer the attached attachment

https://brainly.in/question/46997293

Factorise : mn(3m2 – 4n2) – np(4n2 – 3m2) + pm(15m2 – 20n2)

https://brainly.in/question/45559411