(8m^7 - 10m^5) / 2m^3

Question

Answer choices - 4m^7 - 5m^5
4m^4 - 10m^5
8m^7 - 10m^2
4m^4 - 5m^2,

please show me your work

Simplify into one fraction

-2/x+3 - 4/x-5

answer choices - -6x - 2/ (x+3)(x-5)
6(x-1)/(x+3)(x-5)
-6/(x+3)(x-5)

Simplify into on fraction

7/x-3 + 3/x-5

answer choices : -10x - 44/ (x-3)(x-5)
10x - 44/ (x-3)(x-5)
10x/(x-3)(x-5)

Simplify into one fraction
-1/x-9 - -2/x+7

Answer choices - 1/(x-9)(x+7)
-3/(x-9)(x+7)
x - 25/(x-9)(x+7)

Answer 1

(8m^7 - 10m^5) / 2m^3
= 8m^7/2m^3 - 10m^5/2m^3
= 4m^4 - 5m^2

-2/(x+3) - 4/(x-5)
= [-2(x-5) - 4(x+3)] / (x+3)(x-5)
. . .

7/(x-3) + 3/(x-5)
= [7(x-5) + 3(x-3)] / (x+5)(x-3)
. . .

-1/(x-9) - -2/(x+7)
= [-(x+7) + 2(x-9)] / (x-9)(x+7)
. . .