Helping students gain understanding and self-confidence in algebra.
santaclaus wrote:x2 - square root of x = 4 - square root of x
x = 4
x= plus or minus 2
Actually, -2 does not satisfy the original equation. Explain the appearance of the extraneous solution. If both sides of the original equations are functions, what is happening here? -- don't understand what extraneous solution means.
santaclaus wrote:...when I looked at the help area you told me to go to, I saw that you had to square both sides and then solve the equation: so, i tried: x4-2x+x=16-4x+x