can you please help me solve quadatric equation 4x^2-12x+9=0

Question

anonymous · Answer

(3-2 x)^2 = 0
Factor
x = 3/2

anonymous · Answer

$$4x^2-12x+9=(2x-3)^2=0$$$$(2x-3)^2 = 0$$$$(2x-3) = 0$$$$2x = 3$$$$x =3/2$$

anonymous · Answer

Never mind, I got it wrong. >___> Sorry. :'D

amistre64 · Answer

factoring is great, when it can be done; but completing the square is the long version of the quadratic formula

anonymous · Answer

Why complete the square when you can factorise/use the formula?

amistre64 · Answer

4x^2-12x+9=0

4(x^2 -3x+___) = -9 + 4(___)

4(x^2 -3x+9/4) = -9(4)/4 + 4(9/4)

4(x-3/2)^2 = 0

(x -3/2)^2 = 0

x = 3/2 maybe?

amistre64 · Answer

completeing the square is just a good thing to know for other conics :)

anonymous · Answer

Exactly, no point doing extra work for nothing.

amistre64 · Answer

and can be less of a headache when working the math

amistre64 · Answer

unles syou do it by calculator :)

anonymous · Answer

Only if you are not sure about the formula, which completes the square for you