Solve using the quadratic formula

2n^2- 15 = -4n

Step-by-step explanation:

We are given the equation:

And we want to solve using the quadratic formula.

First, isolate the equation:

Recall that for equations in the form ax² + bx + c = 0, the solutions are given by:

In this case, a = 2, b = 4, and c = -15.

Substitute and evaluate:

In conclusion, our two solutions are:

step-by-step explanation:

consider the parallelogram shown in the attached image.

in the parallelogram hijk, the length of hk is given as,

from the properties of parallelogram we know that the opposite sides of a parallelogram are parallel to each other and are equal in measure.

therefore, the length of the side ij must be equal to the length of the side hk and that is .

hence, the expression for the length of ij confirms that hijk is a parallelogram.