Math
posted by Jenny .
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

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
Respond to this Question
Similar Questions

Math
thanks for the answers, but I need to know how to solve the problems, so I can finish the remainder of my homework. Use a power of ten to change each to a decimal. 2 1/2 4 1/25 I need to learn how to solve these types of problems. … 
math,bobpursley
Is this the correct way to solve these math problems and are the answers correct. Directions:Solve the following applications. Science. Jose rode his trail bike for 10miles. Twothirds of the distance was over a mountain trail. How … 
Logs.
Can you please help me with the following log. problems? 
Algebra
i forgot how to solve these types of problems.. 2x^218x=0, x^2=6x+7, 6y^2+5y6=0 Also SOLVE FOR X CORRECT TO 4 DECIMAL PLACES: x^2+6x+2=0 2x+4=3x^2 
Basic Math
I forgot how to solve for two variables... Please check if I solved both problems properly! Thank you. Equations: (solve for t and z) 12t + 4z = 80 2t + 4z = 20 My answer: t = 2, z = 14 The steps: (simplified it) z = 20  3t, z = 5 … 
English
It is very rude of you to behave like that. It is very wise of you to answer the question. It is very stupid of you not to solve the math problems. It is smart of you to solve the math problems. It is careless of you to hit the jar … 
algebra 2
Solve the equation for x. Round your answer to two decimal places. Do not include "x =" in your answer. ln(e^18x) = 9 
Math
Solve for x,correct to TWO decimal places 4+5x>6x to the power 2 
Math
Solve the exponential equation. Use a calculator to obtain a decimal approximation, correct to two decimal places, for the solution. 7^4x = 4.9 
fifth grade math
How many decimal places are in the product of a number with decimal places to the hundredths multiplied by a number with decimal places to the tenths?