Subtract 5m2 + 2m + 9 from 7m2 – 5m – 8.?

Answer 1

7m2 - 5m - 8
5m2+ 2m+9
- - - ( sign changes in algebraic subtraction)
---------------------------
2m2-7m-17 ans.

Answer 2

this question is made easy by grouping terms(variables) with the same exponents:

= (7m2-5m-8) - (5m2+2m+9) // multiply terms on the right bracket with the negative sign outside the bracket

= (7m2 - 5m2)(-5m - 2m)(-8 - 9) // group like terms

remember terms with the same sign are added 2gether

= 2m2 - 7m - 17

Answer 3

Just do like terms.

7m^2 - 5m^2 = 2m^2 because 7-5 = 2.

-5m - 2m you can do for yourself: What's -5-2?

and you can do -8-9.

Maybe it would have been a little trickier if it were
Subtract 5m^2 - 2m + 9 from 7m^2 - 5m - 8.

The m^2 term and the constant are still the same, but
-5m -(-2m) = -5m + 2m = -3m

Or again, if it were
Subtract 5m^2 - 11m + 9 from 7m^2 - 5m - 8

we'd have
-5m -(-11m) = -5m + 11m = 6m

Answer 4

7m2 - 5m - 8 - 5m2 -2m - 9 = 2m2 - 7m - 17

Answer 5

(7m^2 -5m -8)-(5m^2 +2m +9)
7m^2 -5m -8 -5m^2 -2m -9=0
2m^2 -7m -17=0
then if u wanted to calculate m...
(7+or- root 7^2 -4x2x-17)/4
m= 5.15 or -1.65

Answer 6

=2m^2-7m-17

Answer 7

2m^2-7m-17

Answer 8

5m² + 2m + 9 from 7m² - 5m - 8

- - - - - - - - - -
7m² - 5m - 8
-5m² - 2m - 9
- - - - - - - - - -

2m² - 7m - 17

- - - - - - - -s-