divdiv365 divdiv365

02-09-2017
Mathematics

contestada

three times the square of a non-zero number is equal to fifteen times the number.. what is the number?

Respuesta :

wolf1728 wolf1728

02-09-2017

3 * (x^2) = 15x
3x^2 -15x = 0
x= - -15 +- sq root (225 -4*3*0) / 2*3
x = [15 +-sq root (225 -4*3*0] / 6
x1 = [15 +15] / 6
x1 = 5

x2 = [15 -15] / 6
x2 = 0

The number is 5

Check
3 * 5^2 = 15 * 5
75 = 75

Answer Link

Otras preguntas

Find the percent. (screenshot included ^^)

how to solve this x/2-7=9

Fix any punctuation or capitalization errors below. Click "Submit Answer" if thereare none.I saw that Guardian's sunglasses were: scratched,missing a lens, and

One large calorie is the amount of energy it would take to raise the temperature of one kilogram water by one degree Celsius. Calories in food are the amount of

After Boadicea had been so cruelly and unjustly treated, she burned with anger against the Romans. Her heart was full only of thoughts of revenge. -An Island St

You wish to lift a 12,000 lb stone by a vertical distance of 15 ft. Unfortunately, you can only generate a maximum pushing force of 2,000 lb. What is the amoun

Which graph most likely shows a system of equations with no solutions?

__5. What is responsible for the color and texture of our hair? a. The Locard principle C. Our genes b. Brushes and picks d. None of the above

In the Volume of Prisms section, where is the height of a prism located? * a) the vertical distance b) the horizontal distance c) the distance between the two b

can someone please put in the answer for lines 311-322