SOLUTION: Use the quadratic formula to solve the following equation:
9x^2 - 12x = 4
The answer I worked was:
9x^2 - 12x - 4 = 0
x = -12 +/- sqrt 12^2 - 4(9)(4) / 2 (9)
x = 0/18
x =
Question 152616This question is from textbook Applied Calculus for the Managerial, Life and Social Sciences
: Use the quadratic formula to solve the following equation:
9x^2 - 12x = 4
The answer I worked was:
9x^2 - 12x - 4 = 0
x = -12 +/- sqrt 12^2 - 4(9)(4) / 2 (9)
x = 0/18
x = 0
However, in the book, it shows the answer as:
2/3(1 - sqrt 2); 2/3(1 + sqrt 2)
Can you please explain how I get to this answer? What am I doing wrong?
Thank you sooo much for your help. This question is from textbook Applied Calculus for the Managerial, Life and Social Sciences
You don't have the formula right:
The solution to
is
Your problem is
, ,
Factor 12 out of the top
Divide 12 and 18 by 6
That is equivalent to your answers:
Edwin