SOLUTION: what does "x" equal? (x+1)(x-3)=4 What does "x" equal? x(x-2)= -6

Question 39154: what does "x" equal?
(x+1)(x-3)=4

What does "x" equal?
x(x-2)= -6
Answer by Nate(3500) (Show Source): You can put this solution on YOUR website!

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

Discriminant d=32 is greater than zero. That means that there are two solutions: .

Quadratic expression can be factored:

Again, the answer is: 3.82842712474619, -1.82842712474619. Here's your graph:

x(x-2)= -6

Solved by pluggable solver: SOLVE quadratic equation with variable

Quadratic equation (in our case ) has the following solutons:

For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

The discriminant -20 is less than zero. That means that there are no solutions among real numbers.

If you are a student of advanced school algebra and are aware about imaginary numbers, read on.

In the field of imaginary numbers, the square root of -20 is + or - .

The solution is

Here's your graph:

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