Algebra
posted by Clueless on .
i need to use the quadratic formula 2 solve these 4 questions:
1. x(squared)6x+4=0
2. t(squared)+4t2=0
3. 3x(squared)+10X+5=0
4. 2x=7x(squared)
I just can't seem 2 get the right answer!

x^2  6 x + 4 = 0
x = [ 6 +/ sqrt (36 16) ] / 2
x = 3 +/ 2 sqrt (9  4)
x = 3 +/2 sqrt (5)
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t^2 + 4 t  2 = 0
t = [ 4 +/ sqrt (16 + 8) ] / 2
t = [4 +/ 2 sqrt (4+2) ] / 2
t = 2 +/ sqrt (6)
====================
3 x^2 + 10 x + 5 = 0
x = [ 10 +/ sqrt (100  60) ]/6
x = [ 10 +/ 2 sqrt (25  15) ]/6
x = 5/3 +/ (1/3) sqrt (10)