document.write( "Question 1094145: For the quadratic equation 2x^2 + bx + 3 = 0, explain how to find a value of b where the discriminant yields a quadratic equation with the following types of solutions.
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document.write( "A. two imaginary solutions
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document.write( "B. one real solution
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document.write( "C. two rational solutions
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document.write( "D. two irrational solutions \n" );
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Algebra.Com's Answer #708827 by greenestamps(13200)![]() ![]() You can put this solution on YOUR website! With the standard form of a quadratic equation \n" ); document.write( " \n" ); document.write( "the discriminant \n" ); document.write( " \n" ); document.write( "in the quadratic formula determines which of these different cases you have. \n" ); document.write( "(1) If the discriminant is negative, there are no real solutions -- i.e., case A: two imaginary solutions. \n" ); document.write( "(2) If the discriminant is zero, there is a single real solution: case B. \n" ); document.write( "(3) If the discriminant is positive, then there are two real solutions. Furthermore, the solutions are rational if the discriminant is a perfect square (case C), or they are irrational if the discriminant is not a perfect square (case D). \n" ); document.write( "With your quadratic, the discriminant is \n" ); document.write( " \n" ); document.write( "So you have... \n" ); document.write( "Case A, if b^2 is less than 24; \n" ); document.write( "Case B, if b^2 is equal to 24; \n" ); document.write( "Case C, if b^2-24 is a positive perfect square; and \n" ); document.write( "Case D, if b^2-24 is positive but not a perfect square. \n" ); document.write( " |