Question

Four times of a positive whole number is 30 less than twice thecsquare of the number.The number is:

Answer 1

Answer:

let the whole number be x

Step-by-step explanation:

according to the condition,

4(x)=2 x^2-30

=>   2 x^2-4(x)-30=0

=>   x= -5   or    x=3

since the number is whole number, -5  is not possible

therefore x=3