###### Asked in Math and ArithmeticAlgebraGeometry

Math and Arithmetic

Algebra

Geometry

# Can you solve a quadratic equation by completing the square even though it is not a perfect square?

## Answer

###### Wiki User

###### April 19, 2008 8:57PM

Yes, it won't be exact, but you can round the number to get a close estimate.

## Related Questions

###### Asked in Math and Arithmetic, Algebra

### What is the third step in solving this equation by completing the square?

Completing the square is one method for solving a quadratic
equation. A quadratic equation can also be solved by several
methods including factoring, graphing, using the square roots or
the quadratic formula. Completing the square will always
work when solving quadratic equations and is a good tool to have.
Solving a quadratic equation by completing the square is used in a
lot of word problems.
I want you to follow the related link that explains the concept
of completing the square clearly and gives some examples. that
video is from brightstorm.

###### Asked in Math and Arithmetic

### Can all quadratics be solved by completing the square?

Completing the square is one method for solving a quadratic
equation. A quadratic equation can also be solved by factoring,
using the square roots or quadratic formula. Solving quadratic
equations by completing the square will always work when
solving quadratic equations
-You can also use division or even simply take a GCF, set the
quantities( ) equal to zero, and subtract or add to solve for the
variable

###### Asked in Math and Arithmetic, Education

### Completing the square method?

Completing the square is a method to solve quadratic equations.
To use this method you take the number without a variable and
subtract it from both sides, so that it is on the opposite side of
the equation. Then add the square of half the coefficient of the
x-term to both sides. This will give you a perfect square equation
to solve for.

###### Asked in Math and Arithmetic

### Xsquare plus 34x equals 56?

It doesn't look as if you can solve this easily with factoring;
you might try completing the square, or use the quadratic formula,
with a = 1, b = 34, c = 56.
Improved answer:
Presumably this is a quadratic equation in the form of x2+34x =
56.
Rearrange the equation in the form of:
x2+34x-56 = 0
Then by completing the square or using the quadratic equation
formula the values of x will work out as:
x = -17- the square root of 345
or x = -17+ the square root of 345
Your maths tutor should be familiar with the above methods of
solving quadratic equations if you're not too sure.

###### Asked in Math and Arithmetic, Algebra

### Why quadratic equation is called quadratic?

In mathematics, a quadratic equation is a polynomial equation of
the second degree. The general form is
Where x represents a variable, and a, b, and c, constants, with
a ≠ 0. (If a = 0, the equation becomes a linear equation.)
The constants a, b, and c, are called respectively, the
quadratic coefficient, the linear coefficient and the constant term
or free term. The term "quadratic" comes from quadratus, which is
the Latin word for "square." Quadratic equations can be solved by
factoring, completing the square, graphing, Newton's method, and
using the quadratic formula (given below). One common use of
quadratic equations is computing trajectories in projectile
motion.
Because it is in the form of ax^2+bx+c=0

###### Asked in Math and Arithmetic, Algebra, Calculus

### Solve x2 plus 18x plus 4 equals 0?

This quadratic equation which will have two solutions can be
solved by completing the square or by using the quadratic equation
formula.
Completing the square:
x2+18x+4 = 0
(x+9)2+4 = 0
(x+9)2+4-81 = 0
(x+9)2 = 77
x+9 = + or - the square root of 77
x = -9 + or - the square root of 77
If you're not too sure about the procedure of completing the
square your maths tutor should be familiar with it.