document.write( "Question 142921: HELP\r
\n" ); document.write( "\n" ); document.write( "a)solve 4x^2=12 I have to find x for this one
\n" ); document.write( "b)Find the intercepts of f(x)=4x^2-12 \r
\n" ); document.write( "\n" ); document.write( "I am totally lost on this
\n" ); document.write( "Thanks \n" ); document.write( "

Algebra.Com's Answer #104011 by Earlsdon(6294) $\"\"$ $\"About$

You can put this solution on YOUR website!
a) Solve for x:
\n" ); document.write( " $\"4x%5E2+=+12\"$ Divide both sides by 4.
\n" ); document.write( " $\"x%5E2+=+3\"$ Now take the square root of both sides.
\n" ); document.write( " $\"x+=+sqrt%283%29\"$ or $\"x+=+-sqrt%283%29\"$
\n" ); document.write( "b) Find the zeros of:
\n" ); document.write( " $\"f%28x%29+=+4x%5E2-12\"$ Finding the zeros of this quadratic equation means find the values of x where the parabola intercepts the x-axis, and, of course, at these points, y = 0 or f(x) = 0, so...
\n" ); document.write( " $\"0+=+4x%5E2-12\"$ Add 12 to both sides.
\n" ); document.write( " $\"12+=+4x%5E2\"$ Divide both sides by 4.
\n" ); document.write( " $\"3+=+x%5E2\"$ Take the square root of both sides.
\n" ); document.write( " $\"x+=+sqrt%283%29\"$ or $\"x+=+-sqrt%283%29\"$ \n" ); document.write( "

\n" );