4x^2-7x-3-()=2x^2-3x+8 求括号里面的真相- -_数学解答

4x^2-7x-3-()=2x^2-3x+8 求括号里面的真相- -

人气：438 ℃　时间：2019-12-12 20:41:18

解答

4x² - 7x - 3 -( ) = 2x² - 3x + 8
( ) = 4x² - 7x - 3 - 2x² + 3x - 8
( ) = 2x² - 4x - 11