An equation in the form of a polynomial having a finite number of terms and equated to zero as 2 x 3 4 x 2 x 7 0. Examples are x3 1 and y4x2 2xy yx 1 12. A variable is an important concept of algebra.
For example x 5 3 x 1 0.
If you are asked to fill in the box you can do the simple arithmetic and know that the answer should be 3. 10 2 12 4a - 3b 1 e x y - 2. The last example is a word problem that requires an equation with variables on both sides. Quintic equations have no formulas and can sometimes be unsolvable.