Question

If 12 is subtracted form 3 times the square of a possitive number the result is 5 times the number find the number

Answer 1

Answer:

Number = 3

Step-by-step explanation:

Let the number be x

3x² - 12 = 5x

⇒ 3x² - 5x - 12 = 0

⇒ 3x² - 9x + 4x -12 = 0

⇒ 3x( x - 3) + 4(x - 3) = 0

⇒ (3x + 4)(x - 3)

x = 3 , -4/3

Since, -4/3 is not applicable.

Number = 3