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put this solution on YOUR website!9x^2 - 18x = -3
We want the coefficient of x^2 to 1, divide equation by 9
x^2 - 2x =
x^2 - 2x =
x^2 - 2x ____ =
Find the 3rd term to complete the square (-2/2)^2 +1
x^2 - 2x + 1 =
+ 1; add 1 to both sides
x^2 - 2x + 1 =
+
x^2 - 2x + 1 =
Which is:
(x - 1)^2 =
Find the square root of both sides
x - 1 = +/-
Two solutions
x = 1 +
And
x = 1 -
:
How about this? Did it make sense to you?
