Question 707326
{{{ sqrt ( 4x+13 )= 2x-1 }}}
{{{  4x+13 = (2x-1)^2 }}}
{{{  4x+13 = (2x-1)(2x-1) }}}
{{{  4x+13 =  4x^2-4x+1    }}}
{{{  4x+4x-4x^2 =  +1-13    }}}
{{{  -4x^2+8x =  -12    }}}
{{{  -4x^2+8x+12 =0    }}}
{{{  (-4x^2+8x+12)/4 =0/4    }}}
{{{  -x^2+2x+3 =0    }}}

Factor out:
(-x+3)(x+1)
Thus:
First zero:
-x+3=0
-x=-3
x=3

Second Zero:
x+1=0
x=-1