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9th Grade math: Finding the zeros of a function?
I really do not understand how to find the zeros of a function. For example, f(x)=-2x^2 +x , and according to the back of the book (This is a problem that I don t have to do because the answers are in the back of the book) the answer is 0, 1/5.
Could you please explain how to do this? and explain it with this problem too?
f(x)=x^2-15x
2 Answers
- DWReadLv 76 years ago
The book is incorrect. The roots are 0, ½.
f(x) = -2x²+x
You need to solve -2x²+x = 0.
x(1-2x) = 0
x = 0 or 1-2x = 0
x = 0 or ½
:::::
f(x) = x²-15x
solve x²-15x = 0
x(x-15) = 0
x = 0, 15
- MichelleLv 66 years ago
You are in 9th grade and you don't recognize a quadratic equation? What school for ignorants passed you?
