Question

Решите уравнение 5х^2-12х+7=0

Answer 1

5x²-12x+7=0
D=-12²-4*5*7=144-140=4
x1=12-2/(разделить)10=1
x2=12+2/10=1.4
Ответ:1;1.4.

Answer 2

$5 x^{2} -12x+7=0 \ D=b^2-4ac=144-4*5*7=144-140=4 \ sqrt{D} = sqrt{4} =2 \ x_{1} = frac{-b+D}{-2a} = frac{12+2}{-10} = frac{14}{10} =1.4 \ x_{2} = frac{-b-D}{-2a} = frac{12-2}{10} =1$