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Phổ biến Word Problems >

Five times a positive number is less than twice its square by 3. Find the number.

Lời Giải

F i v e t im es a p os i t i v e n u mb er i s l ess t han tw i ce i t s s q u a re b y 3. F in d t h e n u mb er .

Lời Giải

The number : 3

Các bước giải pháp

Represent the number with

x

A.T.Q.:

5 x = 2 x^{2} - 3

Giải

x, 5 x = 2 x^{2} - 3 : x = 3, x = - \frac{1}{2}

Select positive solutions:

3

The number : 3

Ví dụ phổ biến

The sum of three numbers is 14. The sum of twice the first number, 3 times the second number, and 4 times the third number is 36. The hiệu between 3 times the first number and the second number is 20. Find the three numbers.the product of two consecutive positive integers is 20. find the value of the greater integer.Marissa drives for 3hours at 60km per hour. Maricel drives 260kilometers in 4hours. How far would Marissa travel if she drove for 3hours at the same speed as Maricel The product of two consecutive positive odd integers is 35. Find the value of the greater integer the sum of ten and quotient of a number and 3 is equal to the hiệu between twice the number and 5