Помагите 31х+77=15(х+1)^2

31х+77=15(х+1)^2 31х+77=15(х^2+2x+1) 31x+77=15x^2+30x+15 31x+77-15x^2-30x-15=0 -15x^2+x+62=0 D=1^2-4*(-15)*62=1+3720=3721 [latex] x_{1} = \frac{-1+ \sqrt{3721} }{2*(-15)} = \frac{-1+61}{-30} =-2 [/latex] [latex] x_{2} = \frac{-1- \sqrt{3721} }{2*(-15)} = \frac{-1-61}{-30} =2,07[/latex]