Question

Розкласты на множныкы х квадрат+17х+30

Answer 1

$x^{2} +17 x+30=0 \ D=289-120=169 \ sqrt{D} =13 \ x_{1} = frac{-17+13}{2} = frac{-4}{2} =-2 \ x_{2} = frac{-17-13}{2} = frac{-30}{1} =-15 \ x^{2} +17 x+30=a(x_{0} -x _{1} )( x_{0} - x_{1}) \ x^{2} +17 x+30=(x_{0} +2)( x_{0} +15 )$