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2006-10-16 13:40:42 · 5 answers · asked by Anonymous in Education & Reference ➔ Homework Help
math is power
2006-10-16 14:55:32 · answer #1 · answered by nick_lupro 3 · 0⤊ 0⤋
X^4=3X^2+4
X^4-3X^2-4=0
(X^2-4)(X^2+1)=0
so X^2=-1 imaginery number
or X^2=4
then X=sq root(4)=2, or -2
2006-10-16 20:53:08 · answer #2 · answered by iamantonio 2 · 0⤊ 0⤋
x^4=3x^2=4
x^4-3x^2-4=0
(x^2+1)(x^2-4)=0
(x^2+1)=0 ```````````````````````````````````````````````````````` (x^2-4)=0
Cannot =0 cuz ```````````````````````````````````````````````` x^2=4
cant take sq. root of negative ````````````````````````` ````` X=2, -2
2006-10-16 20:47:23 · answer #3 · answered by lenkug 2 · 0⤊ 0⤋
Start by moving the 3x^2 + 4 to the left by subtracting
x^4-3x^2-4=0
then factor
(x^2-4)(x^2+1)=0
(x+2)(x-2)(x+sqrt(-1))(x-sqrt(-1))=0
j
2006-10-16 20:44:52 · answer #4 · answered by odu83 7 · 0⤊ 0⤋
sorry wrong question to answer
2006-10-16 20:44:12 · answer #5 · answered by queencasper13 3 · 0⤊ 0⤋