document.write( "Question 204169: I need help with a problem, could someone please help me. How do create a real life situation that fits into the equation (x+3)(x-5)=0. I know how to solve the equation, but I'm not sure how I can create a real life situation to fit the equation to express the situation as the same equation. \n" ); document.write( "
Algebra.Com's Answer #154134 by RAY100(1637)\"\" \"About 
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Usually a quadratic equation deals with area, length * width
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\n" ); document.write( "In this case we could ask for the area if a rectangle, that is similar to a square(x*x), but has length longer by 3, and width shorter by 5
\n" ); document.write( "However, this will result in a number, not zero
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\n" ); document.write( "If we expand (x+3)(x-5) = x^2 -2x -15 =0,, and set it equal to y, we have a parabolic function, (y+15) =x^2 -2x,,or (y+15) +1 = x^2 -2x +1,,,,
\n" ); document.write( "(y+16) = (x-1)^2
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\n" ); document.write( "We could then ask for the roots of the function.
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\n" ); document.write( "In real life application, this could be temperature, with limits at y=0,,
\n" ); document.write( "or population trends, with critical points at y=0,
\n" ); document.write( "or the definition of projectile motion(football,or bullet), and y=0 would define range.\r
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