If 5 times a certain integer is subtracted from twice The square of the integer, the result is 63.find The integer
2 i^2 - 5 i = 63
2 i^2 - 5 i - 63 = 0
(i-7)(2i+9) = 0
use i = 7 (not i = -4.5)
2 i^2 - 5 i - 63 = 0
(i-7)(2i+9) = 0
use i = 7 (not i = -4.5)