Thursday
May 23, 2013

# Homework Help: Math

Posted by Amu on Wednesday, March 2, 2011 at 12:18pm.

3x^2 - x - 4

• Math - Bosnian, Wednesday, March 2, 2011 at 2:45pm

y=ax^2+bx+c

a=3 b=-1 c=-4

Discriminant: D=b^2-4ac

D=(-1)^-4*3*(-4)

D=1+48

D=49

When D>0 equation hawe two real solutions.

x1=[-b-sqroot(b^2-4ac)]/2a

x1=[-(-1)-sqroot(49)]/(2*3)

x1=(1-7)/6

x1= -6/6

x1= -1

x2=[-b+sqroot(b^2-4ac)]/2a

x2=[-(-1)+sqroot(49)]/(2*3)

x2=(1+7)/6

x2=8/6

x2=(2*4)/(2*3)

x2=4/3

x2=1.333333

When you see lis of results go to:

Related Questions

Algebra - (3x+4)/(3x-4)+(3x-4)/(3x+4) --------------------------- Divide top by ...
Math (Calculus AB) - An equation to the graph of y=x^3+3x^2+2 at its point of ...
Math - If g(x)= 3x-8, find g[g(-4)]. A)-68 B)4 C)-20 D)52 I got C 3x-8[3x-8(-4...
calculus - I am trying to find equation of the tangent line to the curve 2/(1-3x...
Math 115 - Which number shown in parentheses is a solution of the given equation...
Math - Transform to a Cartesian Equation: a. x = sin t y = cos t b. x = t^(1/3...
Reasons in Proof - *I KNow only #6 which is relfexive,I think...You have to find...
math - wat is an equation of the line that passes through the point (4,-6) and ...
Algebra.. - Check These Answers Please? f(x)= x^2+3 ; g(x)=3x-1 1. (f+g) =x^2+3x...
Math - Differentiate g(x)=(x^3+1)(3x^2-1) so I use g'(x) X h(x) + g(x) X h&#...