simplify: 4m /5n^2 - n /2m?

a. 8m^2 - 5n^3 /10n^2m
b. 8m^2 + 5n^3 /10n^2m
c. 4m-n /5n^2-2m
d. 2 /5n^2

2007-03-21 03:35:30 · 1 answers · asked by jakw w 1 in Science & Mathematics ➔ Mathematics

1 answers

4m/5n^2 - n/2m
= (4m*2m - n*5n^2)/5*2*n^2*m
= (8m^2 - 5n^3)/10n^2m
= a.

This was done by finding a common denominator (10n^2m) and then simplifying both the numerator and denominator.

2007-03-21 04:03:23 · answer #1 · answered by JasonM 7 · 3⤊ 1⤋

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