Question

what is the answer?
​

Answer 1

Answer:

2x

4

−14x

2

+

7

2x

​

x

Express  

7

2x

​

x as a single fraction.

2x

4

−14x

2

+

7

2xx

​

To add or subtract expressions, expand them to make their denominators the same. Multiply 2x

4

−14x

2

 times  

7

7

​

.

7

7(2x

4

−14x

2

)

​

+

7

2xx

​

Since  

7

7(2x

4

−14x

2

)

​

 and  

7

2xx

​

 have the same denominator, add them by adding their numerators.

7

7(2x

4

−14x

2

)+2xx

​

Do the multiplications in 7(2x

4

−14x

2

)+2xx.

7

14x

4

−98x

2

+2x

2

​

Combine like terms in 14x

4

−98x

2

+2x

2

.

7

14x

4

−96x

2

​