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Grade: 11

                        

Suppose that four times the square of a number equals 20 times that number.What is the number?

Suppose that four times the square of a number equals 20 times that number.What is the number?

4 months ago

Answers : (3)

Pawan Prajapati
askIITians Faculty
4730 Points
							Answer:

Answer is 5

explanation:

5*5=25

25*4=100

Therefore 20*5=100

Thank you !


Pawan Prajapati
Askiitian
4 months ago
Anshu Kumar
14 Points
							
Suppose that number is x .Now we use the given condition then we get.
x^2*4 = 20*x
cancle one x from both side we get
4*x = 20
x = 20/4
x = 5
19 days ago
Ram Kushwah
106 Points
							
Suppose the number is x
Four times the square of number=4x²
As per given 
4x²=20*x
4x²-20x=0
4x(x-5)=0
 
x=0 or x-5=0
Thus x=0 or 5
 
Neglecting the x=0 then x=5
 
Thus the said number=5
9 days ago
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