document.write( "Question 72188: eqautions and inequalities\r
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\n" ); document.write( "\n" ); document.write( "1) Value for : a=1, b= -1, c =
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\n" ); document.write( "4)What the value of the discriminant means to the graph\r
\n" ); document.write( "\n" ); document.write( "explain what this means to the graph : y=ax^2 + bx + c
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Algebra.Com's Answer #51649 by rmromero(383) $\"\"$ $\"About$

You can put this solution on YOUR website!


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document.write( "x^2 – x – 20   find the positive discriminant
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document.write( "X^2 – 16x + 64  find zero discriminant
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document.write( "3x2 + 4x + 2   find negative discriminant\r
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document.write( "1) Value for :   a=1, b= -1, c = 
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document.write( "2)Calculation
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document.write( "3)Value of discriminant 
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document.write( "4)What the value of the discriminant means to the graph\r
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document.write( "\n" );
document.write( "explain what this means to the graph : y=ax^2 + bx + c\r
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document.write( "A. x^2 – x – 20   find the positive discriminant
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document.write( " 1. Values for : a = 1, b = -1 and c = -20
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document.write( " 2. To find the discriminant x = b^2 - 4ac
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document.write( "                               = (-1)^2 - 4(1)(-20)
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document.write( "                               = 1 + 80
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document.write( " 3.                            = 80        -------------> positive discriminant
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document.write( " 4. Discriminant determines the solution of the equation and x intercept.
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document.write( "    since we have positive discriminant, we have 2 solutions and 2 x-intercept.\r
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document.write( "B. x^2 – 16x + 64  find zero discriminant
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document.write( " 1. Values for : a = 1, b = -16, c = 64
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document.write( " 2. Solve for the discriminant x = b^2 - 4ac
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document.write( "                                 = (-16)^2 - 4(1)(64)
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document.write( "                                 = 256 - 256
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document.write( " 3.                              = 0 -------------> Zero Discriminant
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document.write( " 4. Since we have Zero discriminant, we have 1 soution and 1 x-intercept\r
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document.write( "C. 3x^2 + 4x + 2   find negative discriminant
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document.write( " 1. Value for: a = 3, b = 4, c = 2
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document.write( " 2. x = b^2 - 4ac
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document.write( "      = 4^2 - 4(3)(2)
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document.write( "      = 16 - 24
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document.write( " 3.   = -8 --------------> negative discriminant
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document.write( " 4. Since it is a negative discriminant, there is no solution or no x-intercept\r
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document.write( "Example Let us solve for x: x^2 – x – 20
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document.write( "                            (x -5)(x + 4)
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document.write( "                            x = 5  and x = -4 2 solutions\r
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document.write( "                           x^2 – 16x + 64
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document.write( "                           (x -8)(x - 8)
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document.write( "                            x = 8   one solution\r
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document.write( "You can solve for x for 3x^2 + 4x + 2 using quadratic formula and you will get no solution.\r
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document.write( "I hope this help
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