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x1= -b +√ b2 - 4ac example: add a , b, c are found in the equation 2a quadratic formula f(x)= 5x2+9x - 4 ax2+bx+c x2= -b - √ b2 - 4ac subtract 2a c= -4 a= 5 b= 9 x1= -b +√ b2 - 4ac x1= 2a x2 + 5x -14 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a 4x2 - 49 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a 6x2 + x -5 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a 3x2 +20x + 12 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a 3x2 - 11x - 4 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a 5x2 + 9x + 4 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a 10x2 - 13x + 4 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a 5x2 - 9x - 2 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a 2x2 - 9x - 5 quadratic formula x2= -b - √ b2 - 4ac x2= 2a |