Question

Two times a number plus the square of the number equals 35. find the number.

Answer 1

x=5; you need to set up an equation and the equation would be:


x^2 + 2x = 35
subtract 35 from each side
x^2 + 2x - 35 = 0
(x + 7) (x - 5)
x = -7,5
49 - 14 = 35
25 + 10 = 35