# Solve 2x 2 x 4 0 by completing the square

Asked by wiki @ in **Mathematics** viewed by 201 People

Solve 2x2 + x − 4 = 0. x2 + x + = 0

Asked by wiki @ in **Mathematics** viewed by 201 People

Solve 2x2 + x − 4 = 0. x2 + x + = 0

Answered by wiki @

**Answer:**

The Quadratic Polynomial is

2 x² +x -4=0

Using the Determinant method to find the roots of this equation

For, the Quadratic equation , ax²+ b x+c=0

**(b) x²+x=0**

x × (x+1)=0

x=0 ∧ x+1=0

x=0 ∧ x= -1

You can look the problem in other way

the two Quadratic polynomials are

2 x²+x-4=0, ∧ x²+x=0

x²= -x

So, 2 x²+x-4=0,

→ -2 x+x-4=0

→ -x -4=0

→x= -4

∨

x² +x² +x-4=0

x²+0-4=0→→x²+x=0

→x²=4

x=√4

x=2 ∧ x=-2

As, you will put these values into the equation, you will find that these values does not satisfy both the equations.

So, there is no solution.

You can solve these two equation graphically also.

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