I need help can someone help me get unstuck and let me know if i am correct.thank you.
solve by completing the square.
4x^2+2x-3=0
this is what i am doing:
i used the quadratic equation.
so where i am is in this step:
x = (-2 (+-) sqrt (-44))/(8)
from this point i am stuck:
Problem #2
Solve by using the quadratic equation :
5x^2-4x+1=0
this is where i have almost the last step but i am not sure:
x = (4 (+-) sqrt (-4))/(10)
x= (2 +-sqrt )2))/(5)
The first says...complete the square, you did not do that.
4x^2+2x-3=0
4x^2+ 2x = 3
x^2 + 1/2 x = 3/4
Now we add 1/4 to each side
x^2 + 1/2 x + 1/4 = 1
(x+1/2)^2= 1
square root of each side...
x+ 1/2 = +- 1
x= -1/2 +-1
5x^2-4x+1=0
a= 5 b= -4 c= 1
x= (4+-sqrt (16-20) )/10
x= .4 +- 1/10 sqrt-4
x= .4 +- .2i where i is the sqrt-1
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