A) 3x^2+20x-3=0
B) x^2+4x+13=0
C) 3r^2+4r+5=0
D) x^2-7x-60=0
E) 5x^2-3x-7=0
2007-04-15 10:24:15 · 3 answers · asked by TTC#2 4 in Science & Mathematics ➔ Mathematics
I don't want someone to do my homework. I am in college. This isn't even for a grade. If I wan't someone to do my homework, it would be for something that is for a grade.
2007-04-15 10:32:50 · update #1
You don't want someone to help with your homework; you want someone to DO your homework. I did mine. You do yours.
2007-04-15 10:27:49 · answer #1 · answered by Alice K 7 · 1⤊ 0⤋
Assuming you're trying to find the roots of the equation (that is, solve for x): use the quadratic equation. See below.
For instance:
2x^2 + 16x + 30 = 0
a = 2
b = 16
c = 30
Substitute in for a, b, and c:
x = (-b +/- sqrt(b^2 - 4ac)) / 2a
x = (-16 +/- sqrt(256 - 240)) / 4
x = -4 +/- sqrt(16)/4
x = -4 +/- 1
The roots are:
x = -5
x = -3
2007-04-15 17:41:27 · answer #2 · answered by Evil Jinx 1 · 0⤊ 0⤋
What are the directions? Do you want those factored, do you want the zeros, the derivative?
2007-04-15 17:28:37 · answer #3 · answered by surfing86 2 · 0⤊ 0⤋