Subtract: (-2x² + 9x - 3) - (7x² - 4x + 2)

Solution:

Given expression is

(-2x² + 9x - 3) - (7x² - 4x + 2)

Removing the brackets and multiplying '-' inside, we get

-2x² + 9x - 3- 7x²+4x - 2

Group the like terms together and simplify further.

⇒ -2x² - 7x² + 9x + 4x - 3 - 2

The required expression is 

-9x² + 13x -5

Subtract: (-2x² + 9x - 3) - (7x² - 4x + 2)

Summary:

Solution of (-2x² + 9x - 3) - (7x² - 4x + 2) is -9x² + 13x -5.