Ответ:
1) 4x•(x•2+3x-2)
4x•(2x+3x-2)
4x•(5x-2)
20x²-8x
2) (x-1)•(x+5)
x•x+5x-x-5
x²+5x-x-5
x²+4x-6
3) (5m – 2n)(3m + n)
5m•3m+5mn-2n•3m-2n•n
15m²+5mn-6mn-2n²
15m²-mn-2n²
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Answers & Comments
Ответ:
1) 4x•(x•2+3x-2)
4x•(2x+3x-2)
4x•(5x-2)
20x²-8x
2) (x-1)•(x+5)
x•x+5x-x-5
x²+5x-x-5
x²+4x-6
3) (5m – 2n)(3m + n)
5m•3m+5mn-2n•3m-2n•n
15m²+5mn-6mn-2n²
15m²-mn-2n²