(6-2x)^2-144=0
Can you help me understand how you solve this and why you solve it in such a way.

Question

(6-2x)^2-144=0 
Can you help me understand how you solve this and why you solve it in such a way.

compassionate · Answer

This is a quadratic equation. You can solve it using the quadratic formula. Check this out. http://www.purplemath.com/modules/quadform.htm

icecreamyummy · Answer

X=-9,-3

campbell_st · Answer

a simple step is to add 144 to both sides of the equation 

$$(6 - 2x)^2 = 144$$

then take the square root of both sides 

$$6 - 2x = \pm 12$$

which can become

6 - 2x = 12    and 6 - 2x = -12

so solve both equations to get the solutions to the equations.

anonymous · Answer

http://i.gyazo.com/7bf6fc045a918679b3b59fc6c1f78c77.png how do you know if the 9 and the 3 is possitive or negative