1) Solve the following quadratic equation x 2 + 2x - 24 = 0 a) x = -6, x = 4 b) x = 6, x = -4 c) x = 12, x = -2 d) x = 8, x = -3 2) Find the roots of the quadratic equation -2x2 + 4x = 9 a) (2 - i√-14)/2   ,   (2 + i√-14)/2 b) (2 - i√-56)/2   ,   (2 + i√-56)/2 c) (2 - √14)/2 , (2 + √14)/2 d) (2 - i√14)/2   ,   (2 + i√14)/2 3) Find the zeros of the quadratic function x2 - 3 =6X + 10 a) x= (6±√88)/2 b) x= 3±√22 c) no solution d) x= -3±√22 4) Perform the operation (8-3i) (-4-7i) a) -11+68i b) -53-44i c) -53+44i d) 11-68i 5) What is the solution set to the inequality x2 - 4x - 5 < 0 a) x < -1 or x > 5 b) -5 < x < 1 c) -1 < x < 5 d) x < -5 or x > 1 6) A frog is sitting on the ground when he is scared by a big dog. His movement is modeled by the equation h = -6t2 + 6t where h is the frog's height at any given time, t . How many seconds until the frog is back on the ground? a) 0.5 seconds b) 1.5 seconds c) 1 second d) 2 seconds

Lock #5: Solving Quadratic Equations

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