Ответ:
Объяснение:
1) 2(1-5x)-2(5x+1)(1-5x)= 2-10x-2(1-25x^2)=2-10x-2+50x²=50x²-10x
2) 1/(m+2) +1/(m-2) -4/(m²-4)=
=(m-2+m+2-4)/(m^2-4)=(2m-4)/(m²-4)=2(m-2)/(m-2)(m+2)=2/(m+2)
3) 2(x-1)-4=6(x+2)
2x-2-4=6x+12
2x-6=6x+12
4x=-18 | : 4
X=4,5
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Answers & Comments
Ответ:
Объяснение:
1) 2(1-5x)-2(5x+1)(1-5x)= 2-10x-2(1-25x^2)=2-10x-2+50x²=50x²-10x
2) 1/(m+2) +1/(m-2) -4/(m²-4)=
=(m-2+m+2-4)/(m^2-4)=(2m-4)/(m²-4)=2(m-2)/(m-2)(m+2)=2/(m+2)
3) 2(x-1)-4=6(x+2)
2x-2-4=6x+12
2x-6=6x+12
4x=-18 | : 4
X=4,5