|
Question 919615: What is the value of m in the equation 3x2 – 5x = m if one root is equal to zero?
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! if one of the roots is equal to 0, then f(0) is equal to 0.
your equation is 3x^2 - 5x = m
subtract m from both sides of the equation to get:
3x^2 - 5x - m = 0
the equation is now in standard form of ax^2 + bx + c = 0
if one root is equal to zero, then you should be able to replace x with 0 and the resulting equation should be true.
replace x with 0 and the equation becomes:
3*0^2 - 5*0 - m = 0
this becomes 0 - m = 0
this equation is true if and only if m = 0
that's your solution.
m = 0
your equation becomes:
3x^2 - 5x = 0
you can factor this using the quadratic formula or by completing the square.
when you do, you will get:
x = 0 or x = 5/3.
|
|
|
| |
