Question

There are a few questions I can't figure out, please help with as many as possible :)

TYSM
5.
Add or subtract
(m^2-m-4) + (m-5)
a) m^2-2m+9
b)m^2+2m-9
c)m^2-2m-9****
d)m^2-9
Add or subtract 6. (7x^2-x-2)-(-6x^3+3)

Answer 1

5.

( m² - m - 4 ) + ( m - 5 ) = m² - m - 4 + m - 5 = m² - m + m - 4 - 5 = m² - 9

6.

( 7 x² - x - 2 ) - ( - 6 x³ + 3 ) =

7 x² - x - 2 - ( - 6 x³) - 3 =

7 x² - x + 6 x³ - 3 - 2 =

6 x³ + 7 x² - x - 5