Question

If 13 times a Number, x, is added to twice it's square, the results is 84 (a) obtain a quadratic equation in x.
Answered by Tammy
All it did was ask for the quadratic equation, which would be

2x^2 + 13x - 84 = 0
which does NOT have solutions of -3 and 7

(x - 4)(2x + 21) = 0

x = 4 or x = -21/2 , not the bot's answer
Answered by Bot
(b) Solve the equation

(a) 13x + 2x^2 = 84

(b) x = -3 or x = 7