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 x2 - 3x - 10 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a x2 + 8x + 15 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a x2 +11x + 18 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a 2x2 + 7x + 3 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a 2x2 + 7x - 4 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a 3x2 + 10x - 8 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a x2 + 9x + 20 quadratic formula x2= -b - √ b2 - 4ac x2= 2a x1= -b +√ b2 - 4ac x1= 2a x2 - 5x - 14 quadratic formula x2= -b - √ b2 - 4ac x2= 2a |