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Simplify (5m-2n)². please help me with this.​
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Simplify (5m-2n)². please help me with this.​

User Michael Lawrence
by
4.7k points

1 Answer

3 votes

Answer:

25 m^2 -20mn +4n^2

Explanation:

(5m-2n)²

(5m-2n)(5m-2n)

FOIL

first 5m*5m = 25m^2

outer 5m*-2n = -10mn

inner -2n * 5m = -10mn

last -2n * -2n = 4n^2

Add together

25m^2 -10mn -10mn + 4n^2

25 m^2 -20mn +4n^2

User Lobsang
by
5.4k points
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