13-08-2020
Mathematics

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

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Respuesta :

wegnerkolmp2741o wegnerkolmp2741o

13-08-2020

Answer:

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

Step-by-step 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

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