Which of the following is a root of -5x+x^2
a. -5
b. -3
c. 1
d. 3
e. 5
4 answers
please help now
-5x+x^2 = 0
or, more usual,
x^2 - 5x = 0
x(x-5) = 0
so, what do you think?
or, more usual,
x^2 - 5x = 0
x(x-5) = 0
so, what do you think?
im confused
if the product of two numbers is zero, then one or the other of the numbers must be zero. This is why we always set stuff to zero to solve.
So, if x(x-5) = 0
either
x = 0 ... meaning x=0
x-5 = 0 ... meaning x = 5
5 is the only choice listed.
So, if x(x-5) = 0
either
x = 0 ... meaning x=0
x-5 = 0 ... meaning x = 5
5 is the only choice listed.
1 answer