Solve x 4 - 11x 2 + 18 = 0.
Question
Updated 6/3/2014 10:55:36 PM
Original conversation
User: Solve x 4 - 11x 2 + 18 = 0.

Weegy: x=11
tina.pie88|Points 46|

User: If P(x) = 2x 4 - x 2 + 3x - 1, use synthetic division to find P (2).

Weegy: (3x-2) squared is 9x^2 - 12x + 4.
twistedechoes|Points 46|

User: 9x^2 - 12x + 4.

User: Determine the rational roots of 2x 5 - 11x 4 + 14x 3 - 2x 2 + 12x + 9 = 0. 1/2 1 3/2 3 9/2 9 -1/2 -1 -3/2 -3 -9/2 -9

Weegy: Can you clarify the equation please?

Question
Updated 6/3/2014 10:55:36 PM
Rating
3
x^4 - 11x^2 + 18 = 0
(x^2 - 2)(x^2 - 9) = 0
(x + sqrt 2)(x - sqrt 2)(x + 3)(x - 3) = 0
x = - sqrt 2, x = sqrt 2, x = -3 or x = 3
Confirmed by andrewpallarca [6/4/2014 12:58:58 PM]
3
P(x) = 2x^4 - x^2 + 3x - 1
P(2) = 2(2^4) - 2^2 + 3(2) - 1
= 2(16) - 4 + 6 - 1
= 32 - 4 + 6 - 1
= 28 + 6 - 1
= 34 - 1
= 33
Confirmed by andrewpallarca [6/4/2014 12:59:28 PM]
3
9x^2 - 12x + 4 = (3x - 2)^2
Confirmed by andrewpallarca [6/4/2014 1:00:03 PM]

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