Asked by Babadamidade
Twice the square of a certain whole number added to 3 time the number makes 90.
Answers
Answered by
R_scott
n = 6
Answered by
mathhelper
2x^2 + 3x = 90
2x^2 + 3x - 90 = 0
(x - 6)(2x + 15) = 0
x = 6 or x = -15/2
your number is either 6 or -7.5
2x^2 + 3x - 90 = 0
(x - 6)(2x + 15) = 0
x = 6 or x = -15/2
your number is either 6 or -7.5
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