Posted by Jenny on Monday, September 1, 2008 at 9:03pm.
i forgot how to solve problems like this...
2x^218x=0, x^2=6x+7, 6y^2+5y6=0
also I need help on this one
SOLVE FOR X CORRECT TO 4 DECIMAL PLACES
x^2+6x+2=0 2x+4=3x^2

Math  Damon, Tuesday, September 2, 2008 at 5:35am
2x^218x=0
try to factor first
2x (x9) = 0
so x = 0 or x = 9
x^2=6x+7
x^2 6 x  7 = 0
(x7)(x+1) = 0
so x = 7 or x = 1
6y^2+5y6=0
(6x1)(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
Answer This Question
Related Questions
 Algebra  i forgot how to solve these types of problems.. 2x^218x=0, x^2=6x+7, ...
 Math  thanks for the answers, but I need to know how to solve the problems, so ...
 math,bobpursley  Is this the correct way to solve these math problems and are ...
 fifth grade math  How many decimal places are in the product of a number with ...
 algebra 2  Solve the equation for x. Round your answer to two decimal places. ...
 Basic Math  I forgot how to solve for two variables... Please check if I solved...
 Math  Solve the exponential equation. Use a calculator to obtain a decimal ...
 Logs.  Can you please help me with the following log. problems? thanxs! Solve ...
 Math  Solve for x,correct to TWO decimal places 4+5x>6x to the power 2
 English  It is very rude of you to behave like that. It is very wise of you to ...
More Related Questions