Question 195300
2x^2+8x-25=5

2x^2+8x-30=0 which is in the format of : ax^2+bx+c=0

formula:

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

a=2;b=8;c=-30

{{{x = (-8 +- sqrt( 8^2-4*2*-30 ))/(2*2) }}}

{{{x = (-8 +- sqrt( 64+240))/(4) }}}

{{{x = (-8 +- sqrt( 304))/(4) }}}

{{{x = (-8 +- 4 (sqrt( 19)))/(4) }}}

{{{x = 4(-2 +- sqrt( 19))/(4) }}}

{{{x = (-2 +- sqrt( 19)) }}}