document.write( "Question 1107972: please i want to know how to derive the quadratic formular \n" ); document.write( "

Algebra.Com's Answer #723016 by Boreal(15235) $\"\"$ $\"About$

You can put this solution on YOUR website!
ax^2+bx+c=0
\n" ); document.write( "ax^2+bx=-c
\n" ); document.write( "x^2+(b/a)x=-c/a, dividing everything by a
\n" ); document.write( "complete the square
\n" ); document.write( "(x+(b/2a))^2=-(c/a)+b^2/4a^2, adding the (b/2a)^2 to both sides
\n" ); document.write( "(x+(b/2a))^2=(-4ac+b^2)/4a^2, putting everything over a common denominator.
\n" ); document.write( "x=-(b/2a) +/- sqrt [(b^2-4ac)/4a^2]
\n" ); document.write( "x=(-b/2a)+/- sqrt[(b^2-4ac)]/ 2a
\n" ); document.write( "x=(1/2a)(-b+/- sqrt (b^2-4ac))
\n" ); document.write( " \n" ); document.write( "

\n" );