Question

Answer this question. explain how you got your answer

Answer 1

IF A = 3x² + 5x - 6 and B = -2x² - 6x + 7 then A - B equal is

The correct option is B

5x² + 11x - 13

Explanation:

Given:

A = 3x² + 5x - 6 and

B = -2x² - 6x + 7

To Find :

(A - B) = ?

Solution:

A = 3x² + 5x - 6

B = -2x² - 6x + 7

Now,

( A -B ) = (3x² + 5x - 6 ) - (-2x² - 6x + 7 )

Now first minus sign will enter in the bracket ,

( - )×( - ) = +

( - )×( + ) = -

∴ ( A -B ) = (3x² + 5x - 6 ) + 2x² + 6x - 7

= 3x² + 2x² + 5x + 6x - 6 - 7

= 5x² + 11x - 13

∴ (A - B ) = 5x² + 11x - 13

Therefore,

IF A = 3x² + 5x - 6 and B = -2x² - 6x + 7 then A - B equal is

The correct option is B

(A - B ) = 5x² + 11x - 13

Answer 2

Option B)
`{\bf A-B}={\bf 5x}^(\bf 2)+{\bf 11x-13}`

Explanation:

Given
`A=3x^2+5x-6`

`B=-2x^2-6x+7`

To find
`A-B`

`A-B=3x^2+5x-6-(-2x^2-6x+7)`

`A-B=3x^2+5x-6+2x^2+6x-7)`

`A-B=5x^2+11x-13`

Option B) is correct