When you graph the equation, it hits -1 twice on the x axis; therefore, -1 is a root.
-1 / 4 5 2 5 4
4 1 1 4 0 use synthetic division
-1/ 4 1 1 4
4 -3 4 0 you get 4x^2-3x + 4 now use the quadratic...
See This Answer Now
Start your 48-hour free trial to unlock this answer and thousands more. Enjoy eNotes ad-free and cancel anytime.
Already a member? Log in here.
When you graph the equation, it hits -1 twice on the x axis; therefore, -1 is a root.
-1 / 4 5 2 5 4
4 1 1 4 0 use synthetic division
-1/ 4 1 1 4
4 -3 4 0 you get 4x^2-3x + 4 now use the quadratic equation
3 +- square root of 9 - 4(4)(4) all over 2(4)
3+- square root of -55 all over 8
Final answer: 3 +- i squareroot 55 all over 8