Salirrosasnicol Salirrosasnicol

02-05-2019
Mathematics

contestada

The square of a number decreased by 4 times the number equals 21. Find the number.

Respuesta :

sprinkles1222 sprinkles1222

02-05-2019

Answer: 7

Explanation:

x^2-4x=21

x^2-4x-21=0

(x+3)(x-7)=0

x=-3

x=7

*** if you need to find the positive # only, the ANSWER is 7****

Answer Link

Otras preguntas

what is the volume of the following triangular prism 4cm 12mm and 2.3cm

Formal letter to the editor complaining about the youth of today doesn’t have manners

What does life live for?

An individual erroneously believes that the onset of a certain random event is likely to happen following an event or a series of events. A) Illusion of control

Which of the following statements concerning parenting is not accurate? Parents who are active outside the home have the most trouble dealing with empty nest. M

What are the partial products of 315 x 43

According to the statement, which cells are primarily responsible for mediating adaptive immune responses?

The after schools program has 6 basketball teams and 30 players What is the ratio of teams to players simplify if needed

(100 points on this) The figure shows a tank in the form of a rectangular prism that is 25% full of water. How many more gallons of water will it take to fill t

The R.E.M. stage of sleep is when people often__________