document.write( "Question 1080238: Find the zeros of the polynomial function and state the multiplicity of each
\n" );
document.write( "F(x) = 5(x+7)^2 (x-7)^3 \n" );
document.write( "
Algebra.Com's Answer #694424 by jim_thompson5910(35256)![]() ![]() ![]() You can put this solution on YOUR website! Note: the term \"zeros\" is the same as \"roots\"\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "We have this as our original function \n" ); document.write( "F(x) = 5(x+7)^2 (x-7)^3\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I'm going to highlight the exponents in different colors red and blue so things are separated clearly. \n" ); document.write( "F(x) = 5(x+7)^2 (x-7)^3 \n" ); document.write( "These exponents will be important for identifying the multiplicity.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "-------------------------------------------------------\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "To find the roots, we need to set f(x) equal to zero and solve for x\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "F(x) = 0 \n" ); document.write( "5(x+7)^2 (x-7)^3 = 0 \n" ); document.write( "(x+7)^2 = 0 or (x-7)^3 = 0 \n" ); document.write( "x+7= 0 or x-7 = 0 \n" ); document.write( "x = -7 or x = 7\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So the two distinct roots are x = -7 or x = 7\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The root x = -7 has multiplicity 2. Take note of the specific color coding. This 2 is an exponent for the term (x+7) which is where the root is derived from.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Similarly, the root x = 7 has multiplicity 3 because the 3 is the exponent for (x-7). \r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Extra info: an even multiplicity (such as 2) means that the graph touches the x axis and turns around. Think of a parabola like shape. See the graph below where point A is located for a visual example. An odd multiplicity root is one where the graph crosses over the x axis and keeps going (though it might turn around at some point). A visual example of this is the root where point B is located in the graph below.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Here is what the graph looks like \n" ); document.write( " ![]() \n" ); document.write( "Image generated by GeoGebra (free graphing software). \n" ); document.write( "The arrows indicate that the graph continues on forever along that general curve path (but the window cuts things off). \n" ); document.write( " |