Quadratic Formula

During comprehending the Elementary Algebra, Quadratic formula is used to resolve a quadratic equation. 

Further, to understand the basic arithmetic lessons and encompassed concepts of algebra, this formula is of great importance. The quadratic equations (12x*2 + 20x + 24) have more than a single way for a solution. Including Factoring (direct, AC or grouping) and completing square methods. But clutched with manual ways referred to an old hat and moved on by picking smart fonts of calculations.

Solution of Quadratic Equation from the Quadratic Formula 

To get in clutch with an optimal solution for a simple quadratic equation (ax*2 + bx + c = 0), there are some alternative methods available. ( Where a, b and c are constant, x = unknown while a is not equal to zero or a 0). For such quadratic equation, the Formula is as under:

x = -b ± b*2 – 4ac / 2a

The above equation shows that it can be solved in the following two versions:


  • x = -b + √b*2 – 4ac / 2a
  • x = -b – √b*2 – 4ac / 2a


Each of the above equations known to be the root of the quadratic equation. In geometrical terms, this turned out as the x values for a parabola’s y = ax*2 + bx + c.

Interchangeable Formulations

As the above theme mentions, the Quadratic formula can be written in corresponding ways (Depending on Geometric Significance and Dimensional Analysis). That’ s why here’s another representation for the same formula.

x = -b/2a ± b*2 – 4ac / 4a*2

This can be simplified into:

x  = (-b/2a) ± (b/2a)*2 – c/a

Apart from these, so many are further on the list like Muller’s Method and etc. But the purpose concerned with all of them is the same and smooth.

Why the Quadratic Formula is Important

  • It demands from a physics or mathematical point of view to insert some clear shreds of evidence or the answers with detectable procedures. And for this aim, quadratic equations came into being along with their solution through the quadratic formula.
  • To point out the locus for values on the x-axis or on the y-axis of any parabolic or parallelogram objects.

Trapezoid Area

Rectangles and trapezoids are four-sided figures. Rectangle – Any quadrilateral that is formed by angles on four sides is called a rectangle.

In terms of Rectangle

 Rectangle as a term comes from a word, rectangular, being a combination of angulus and rectus meaning angle and right respectively. A so-called crossed rectangle is your self-intersecting quadrilateral which includes two sides along with two diagonals. Rectangles can be described as a quadrilateral that has an axis of symmetry.

 This definition of trapezoid comprises correct and crossed angle rectangles with each with an axis of symmetry equidistant as well as parallel out of another vertical axis bisector of the sides and each pair on the sides. 

How to find a Trapezoid Area

As we know trapezoid is a structure having 4-sides (a1, b1, a2, b2) in which a pair is a parallel (say a1 and b1) and equal from edges. The height difference between these two lines is (h). Now we can calculate the Trapezoid area in a super effective manner.

  • Draw the sum of trapezoid bases.
  • Make its answer divided by 2.
  • Finally, multiply with a height value.


A = (a1 + b1) ÷ 2 x height  OR  A = ½  . (a1 + b1) . height

Area for Trapezoid, Rectangle, and Median

  • The median is more parallel to both bases. Median length equals half the amount of the base lengths. 
  • Rectangles have four correct angles while trapezoids don’t. Opposite sides of a rectangle are parallel as well as equivalent.
  •  While in case of a trapezoid the other sides of a minimum of one pair are parallel. Diagonals of rectangles must bisect every other while in case of trapezoids that are not necessary to search the difference between. 

One can also use online calculators like quadratic formula calculator and trapezoid area calculator in order to solve math equations and questions on one click. Online calculators are usually fast and efficient to use but one must not rely on online calculators completely as learning the manual concepts are still the major aspect of learning and passing the exams.