Question

плиз помагите
5х квадрат - 7х + 2 = 0

Answer 1

5x²-7x+2=0
D=(-7)²-4*5*2=49-40=9=3²
$x_{1}= frac{-(-7)- sqrt{9} }{2*5} = frac{7-3}{10} = frac{4}{10} =0.4 \ x_{2}= frac{-(-7)+ sqrt{9} }{2*5} = frac{7+3}{10} = frac{10}{10} =1$