Algebra deals with these concepts and can be considered as generalized arithmetic. In general an algebraic equation or polynomial equation is an equation of the form or where P and Q are polynomials with coefficients in some field eg rational numbers real numbers complex numbers. Then replace y in the second equation with 4 to solve for x.
In simple words equations mean equality ie.
In algebra a quadratic equation from the Latin quadratus for square is any equation that can be rearranged in standard form as ax²bxc0 where x represents an unknown and a b and c represent known numbers where a 0. BEDMAS stands for Brackets Exponents Division Multiplication Addition and Subtraction and PEMDAS stands for Parentheses Exponents Multiplication Division Addition and Subtraction. An equation obtained by equating to zero a sum of a finite number of terms each one of which is a product of positive integral powers including the zero power of the variables. The column rank of A is the dimension of the column space of A while the row rank of A is the dimension of the row space of A.