ayuda x fiss los 4 problemas resolver por el método gráfico(ecuaciones cuadráticas)
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3x^2 + x -4 = 0
x = (-1 +-(1+4*3*4)^1/2)/6
x = (7+-1)/6
xsub1 = 1
xsub2 = 4/3
x^2 - 8x - 9 = 0
x = (8 +-(64+4*9)^1/2)/2
x = (8+-10)/2
xsub1 = 9
xsub2 = -1
2x^2 -5x + 2 = 0
x = (5 +-(25-4*2*2)^1/2)/4
x = (5+-3)/4
xsub1 = 2
xsub2 = 1/2
4x^2 -21x + 5 = 0
x = (21 +-(441-4*4*5)^1/2)/8
x = (21+-19)/8
xsub1 = 5
xsub2 = 1/4
x = (-1 +-(1+4*3*4)^1/2)/6
x = (7+-1)/6
xsub1 = 1
xsub2 = 4/3
x^2 - 8x - 9 = 0
x = (8 +-(64+4*9)^1/2)/2
x = (8+-10)/2
xsub1 = 9
xsub2 = -1
2x^2 -5x + 2 = 0
x = (5 +-(25-4*2*2)^1/2)/4
x = (5+-3)/4
xsub1 = 2
xsub2 = 1/2
4x^2 -21x + 5 = 0
x = (21 +-(441-4*4*5)^1/2)/8
x = (21+-19)/8
xsub1 = 5
xsub2 = 1/4
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