Ответ:
x1 = 0, x2 = 0.4
Объяснение:
25x^2-1-10x+20=19
25x^2-10x=0
x(5x-2)=0
《x=0
《x=2/5
(5x-1)(1+5x)-10(x-2)=19
(5x-1)(5x+1)-10(x-2)=19
5x(5x+1)-1(5x+1)-10(x-2)=19
25x²+5x-1(5x+1)-10(x-2)=19
25x²+5x-5x-1-10(x-2)=19
25x²-1-10(x-2)=19
25x²-1-10x+20=19
25x²+19-10x=19
25x²-10x+19=19
25x²-10x+19-19=0
25x²-10x=0
5(5x²-2x)=0
5(5x-2)x=0
5x-2=0
x=0
x=[tex]\frac{2}{5}[/tex]
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Verified answer
Ответ:
x1 = 0, x2 = 0.4
Объяснение:
25x^2-1-10x+20=19
25x^2-10x=0
x(5x-2)=0
《x=0
《x=2/5
Ответ:
Объяснение:
(5x-1)(1+5x)-10(x-2)=19
(5x-1)(5x+1)-10(x-2)=19
5x(5x+1)-1(5x+1)-10(x-2)=19
25x²+5x-1(5x+1)-10(x-2)=19
25x²+5x-5x-1-10(x-2)=19
25x²-1-10(x-2)=19
25x²-1-10x+20=19
25x²+19-10x=19
25x²-10x+19=19
25x²-10x+19-19=0
25x²-10x=0
5(5x²-2x)=0
5(5x-2)x=0
5x-2=0
x=0
x=[tex]\frac{2}{5}[/tex]