Question

If A = x2

+5x+1 and B = x2

-2x2

+7x+9 find 2A-B.​

Answer 1

Answer:

then it is divided by and multiple of 9

Answer 2

Answer:

2x^2 + 3x + 11

Step-by-step explanation:

Given,

A = x^2 + 5x + 1

B = x^2 - 2x^2 + 7x + 9

To find : 2A - B = ?

2A

= 2 ( x^2 + 5x + 1 )

= 2x^2 + 10x + 2

- B

= - ( x^2 - 2x^2 + 7x + 9 )

= - x^2 + 2x^2 - 7x + 9

= x^2 - 7x + 9

2A - B

= 2x^2 + 10x + 2 + x^2 - 7x + 9

= 2x^2 + x^2 + 10x - 7x + 2 + 9

= 2x^2 + 3x + 11