数学解方程(5X-1)的平方=19-5X
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数学解方程(5X-1)的平方=19-5X
数学解方程(5X-1)的平方=19-5X
数学解方程(5X-1)的平方=19-5X
25x²-10x+1=19-5x
x²-x/5=18/25
x²-x/5+1/100=18/25+1/100
(x-1/10)²=73/100
x-1/10=±√73/10
x=(1-√73)/10,x=(1+√73)/10
(5x-1)^2=19-5x,
25x^2-5x-18=0,
△=25+1800=1825,
x=(5土5√73)/50
=(1土√73)/10.
1+或-根号(73)/10
(5x - 1)² = 19 - 5x
25x² - 10x + 1 = 19 - 5x
25x² - 5x = 18
x² - x/5 = 18/25
x² - x/5 + (-1/10)² = (-1/10)² + 18/25
(x - 1/10)² = 73/100
x = 1/10 ±√73/10 = (1/10)(1±√73)
25x的平方-10x+1=19-5x
25x的平方-5x-18=0
b的平方-4ac=1825
x=(5+5根号73)\50或
x=(5-5根号73)\50
所以x=(1+根号73)\10或
(1-根号73)\10
25x²-10x+1=19-5x
x²-x/5=18/25
x²-x/5+1/100=18/25+1/100
(x-1/10)²=73/100
x-1/10=±√73/10
x=(1-√73)/10,x=(1+√73)/10
不懂再问哟!
25x²-10x+1=19-5x
x²-x/5=18/25
x²-x/5+1/100=18/25+1/100
(x-1/10)²=73/100
x-1/10=±√73/10
x=(1-√73)/10,x=(1+√73)/10