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HELP I ONLY HAVE 5 MIN TO TURN THIS IN!!!!!!!!!!!

What are the simplified versions of the expressions shown below

WILL MARKBRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!

HELP I ONLY HAVE 5 MIN TO TURN THIS INWhat are the simplified versions of the expressions shown belowWILL MARKBRAINLIEST class=

Respuesta :

ricchad

Answer:

see below

Step-by-step explanation:

1. (x² - 4x - 10) + (x² - 9x + 3)

=  x² - 4x - 10 + x² - 9x + 3

=  x² + x² - 4x - 9x + 3 - 10

= 2x² - 13x - 7

4. (3x² - x + 1) + (15 - 9x - 2x²)

=  3x² - x + 1 + 15 - 9x - 2x²

= 3x² - 2x² - x - 9x + 1 + 15

= x² - 10x + 16

7.  (6 - 2x + 7x²) - (10x - 3 + 3x²)

=   6 - 2x + 7x² - 10x + 3 - 3x²

=  7x² - 3x² - 2x - 10x + 6 + 3

=  4x² - 12x + 9

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