Question

SOMEONE, PLEASE HELP ME OUT!!!!!! WILL MARK BRAINLIEST

Answer 1

Answer:

see below

Step-by-step explanation:

19. (4x + 8x² - 8) + (x² + 7 - 4x)

=   4x + 8x² - 8 + x² + 7 - 4x

=   8x² + x² + 4x - 4x -8 + 7

=  9x² - 1

20.  (7x² - 11 + 16x) + (5x - 3x² - 7)

=  7x² - 11 + 16x + 5x - 3x² - 7

=  4x² + 21x - 18

22.  (4x² - 12x - 10) - (2x² + x - 3)

=   4x² - 12x - 10 - 2x² - x + 3

=   2x² - 13x - 7

23.  (7x³ - 9x² - 14x) - (4x³ - 4 - x)

=  7x³ - 9x² - 14x - 4x³ + 4 + x

=  7x³ - 4x³  - 9x² - 14x + x + 4

=  3x³ - 9x² - 13x + 4

25. (9x² + 24x - 8) - (5x² + 3x + 10)

=  9x² + 24x - 8 - 5x² - 3x - 10

=  4x² + 21x  - 18

26.  (5x - 12x² + 9x³) - (5x³ + 6x - 3)

=  5x - 12x² + 9x³ - 5x³ - 6x + 3

=  4x³ - 12x² - x + 3

28.  (2x² - 1 + 3x³) + (5 - 13x - 11x²)

=   2x² - 1 + 3x³ + 5 - 13x - 11x²

=  3x³ - 9x² - 13x + 4

30.  (10x - x² + 8) + (5x² + 1 - 22x)

=   10x - x² + 8 + 5x² + 1 - 22x

=   4x² - 12x + 9