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

Kevin can travel 22 1/2 miles in 1/3 hour. What is his average speed in miles per hour?

What is the GCF for 24, 48m

who won the Super Bowl in 1999

A rectangle has a perimeter of 50 centimeters. If the width of the rectangle is 10 centimeters, what is its length? step by step on how you got answer. thank yo

Which city is located by the Baltic Sea? Moscow Kiev St. Petersburg Volgograd

Give an example of a situation in which you would describe an object’s position in: a. one dimension b. two dimensions c. three dimensions

the westside bakery uses 440 pounds of sugar to make 1,000 cakes each cake contain the same amount of sugar how many pounds of sugar are used in each cake

what is the value of the expression 3z-3 when z=7

Which city is located by the Baltic Sea? Moscow Kiev St. Petersburg Volgograd

____________ is the act or process of explaining the meaning of something. a. Nonverbal communication b. Verbal communication c. Observation d. Interpretation