Question 913104


{{{(x+1)^2=16}}}


{{{x^2+2x+1=16}}}


{{{x^2+2x+1-16=0}}}


{{{x^2+2x-15=0}}}



{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 

{{{x = (-2 +- sqrt( 2^2-4*1*(-15) ))/(2*1) }}} 

{{{x = (-2 +- sqrt( 4+60 ))/2 }}} 

{{{x = (-2 +- sqrt( 64 ))/2 }}} 

{{{x = (-2 +- 8)/2 }}} 

solutions

{{{x = (-2 + 8)/2 }}} 

{{{x = 6/2 }}} 

{{{x = 3 }}} 

or

{{{x = (-2 - 8)/2 }}} 

{{{x = -10/2 }}} 

{{{x = -5 }}} 


{{{ graph( 600, 600, -10, 10, -20, 10, x^2+2x-15) }}}