Solve the equation using the quadratic formula x 8x 5 9 S

Solve the equation using the quadratic formula.

(x + 8)(x - 5) = 9

Select one:

Solution

(x + 8)(x - 5) = 9

x²-5x +8x -40= 9

x²+3x -49=0

roots of ax^2 +bx +c =0 ==>x=[-b+(b²-4ac)]/(2a),x=[-b-(b²-4ac)]/(2a)

a=1, b=3,c=-49

x=[-3+(3²-4*(-49))]/(2*1),x=[-3-(3²-4*(-49))]/(2*1)

x=[-3+205]/2,x=[-3-205]/2