x2+5x+6=0

Multiply 2 and x

Multiply 1 and x

The x just gets copied along.

x

x*2 evaluates to 2x

Multiply x and 5

Multiply x and 1

The x just gets copied along.

The answer is x

x

5*x evaluates to 5x

x*2+5*x evaluates to 7x

x*2+5*x+6 evaluates to 7x+6

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The final answer is

7x+6

To solve (find the roots of) the quadratic equation 7x+6 =0:
First, we'll attempt to factor this quadratic equation as a trinomial.

This polynomial has 2 terms. It must exactly three terms to be a trinomial.

Since this quadratic equation cannot be factored as a trinomial
we will not be able to solve it by factoring.