Five times a certain whole number is equal to three less than twice the square of the number.Find the number.
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Step-by-step explanation:
let the number be= x
5 times of number =5x
twice of x = 2x
squaring = 2x²
no. is less than 3 = -3
A. T. Q
5x = 2x² - 3
2x² - 5x - 3 = 0
2x²-(6x - 1x) -3=0
2x² - 6x + 1x - 3 =0
2x(x-3)+1(x-3)=0
(2x +1) (x-3)=0
2x + 1 =0
x=-1/2
x - 3 =0
x =3
x = 3, -1/2
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