Question 764520


{{{x(x^2+ 1) = 0}}}.....equations is not quadratic: when you multiply {{{x(x^2+ 1) = 0}}} you will have {{{x^3+ x = 0}}} and you have the equation of degree 3

{{{5(4x+ 2) = 3}}}.....equations is not quadratic: when you multiply {{{5(4x+ 2) = 3}}} you will have {{{20x+ 10 = 3}}} and you have the equation of degree 1


{{{(x+ 3)(x+ 4) = 5}}}.....equations {{{is}}} quadratic: when you multiply {{{(x+ 3)(x+ 4) = 5}}} you will have {{{x^2+7x+ 12 = 5}}} and you have the equation of degree 2