Precalc question





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Discus: SAT/ACT Tests and Test Preparation: October 2003 Archive: Precalc question
By Akaflex (Akaflex) on Monday, October 06, 2003 - 06:11 pm: Edit

x^4 + x ^2 - 6 = 0

Can sum1 solve the equations tep by step so i can lrn this thanks

By 9331 (9331) on Monday, October 06, 2003 - 06:23 pm: Edit

x^2 (x^2 + 1) = 6
2 consective # times each other to equal 6
2 * 3 = 6

x^2 = 2

By Bigman82085 (Bigman82085) on Monday, October 06, 2003 - 06:48 pm: Edit

Let u=x^2, then the equation is u^2+u-6=0. Solve for u by factoring so that u=3 or -2. Repace u with x^2 and solve for x, yielding x= sqrt(2) or sqrt(3).

By Mo222 (Mo222) on Monday, October 06, 2003 - 07:23 pm: Edit

and x^2 = 0 x=0,0 multiplicity of 2


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