Posted by Jenny on Monday, September 1, 2008 at 9:03pm.
2x^2-18x=0
try to factor first
2x (x-9) = 0
so x = 0 or x = 9
x^2=6x+7
x^2 -6 x - 7 = 0
(x-7)(x+1) = 0
so x = 7 or x = -1
6y^2+5y-6=0
(6x-1)(x+1) = 0
x = 1/6 or x = -1
x^2+6x+2=0
if you can not factor, complete the square or use the quadratic equation
x = [ -b +/- sqrt (b^2 - 4 a c) ] / 2a
x = [ -6 +/- sqrt (36 - 8) ] / 2
use calculator to 4 places
Related Questions
Algebra - i forgot how to solve these types of problems.. 2x^2-18x=0, x^2=6x+7, ...
Math - How do I solve these problems, I really need help. Solve by substitution ...
algebra - show how to solve these problems: 1. 6x - y = -4 2x + 2y = 15 answer:x...
MATH - Solve system of equations algebraically. 1. 3x-3y=24 and 2x+5y=-37 2. -9x...
math - 1/4x-1/6y=-2 -1/6x+1/5y=4 solve for x and y its suppose to be x equals 12...
12th grade maths - factorise: 2x^2+6x-16, and 14x^2-3x-2. Solve: 6y^2-5y-6=0, ...
math - solve the system x+6y =24 -6x+5y =-21
Math help - 6y³(2x - 5y² + 8) help solve
Rational Expression - (x+1/2x-1 - x-1/2x+1) * (2x-1/x - 2x-1/x^2) (x+1/2x-1 - x-...
Math/Check - I have a few problems I need you to take a look at and tell me if ...
For Further Reading
