document.write( "Question 541777: What are the x intercepts of the parabola wiht a vertex(3,-2) and y-intercept (0,-7) \n" ); document.write( "
Algebra.Com's Answer #354363 by lwsshak3(11628)![]() ![]() ![]() You can put this solution on YOUR website! What are the x intercepts of the parabola with a vertex(3,-2) and y-intercept (0,-7) \n" ); document.write( "** \n" ); document.write( "Standard form of equation for a parabola: y=A(x-h)^2+k, (h,k)=(x,y) coordinates of the vertex. \n" ); document.write( "For given parabola: \n" ); document.write( "y=A(x-h)^2+k \n" ); document.write( "y=A(x-3)^2-2 \n" ); document.write( "using coordinates of given point (0,-7) \n" ); document.write( "-7=A(0-3)^-2 \n" ); document.write( "-7=A(3)^2-2 \n" ); document.write( "9A=-5 \n" ); document.write( "A=-5/9 \n" ); document.write( "Equation of given parabola: \n" ); document.write( "y=A(x-3)^2-2 \n" ); document.write( "y=(-5/9)(x-3)^2-2 \n" ); document.write( ".. \n" ); document.write( "x-intercepts: \n" ); document.write( "set y=0 \n" ); document.write( "(-5/9)(x-3)^2-2=0 \n" ); document.write( "-5(x-3)^2=2 \n" ); document.write( "(x-3)^2=-2/5 \n" ); document.write( "(x-3)=√(-2/5) \n" ); document.write( "x=√(-2/5)+3 \n" ); document.write( "no real number solution \n" ); document.write( "x-intercepts: none \n" ); document.write( " |