How to solve this math problem (algebra)?

x^4 + x^2 - 6 =0

sparky2011-09-05T13:10:19Z

Favorite Answer

there are a lot of ways...

one is to factor:

(x² + 3)(x² - 2) = 0 <-- kind of like backwards FOIL

then

x² + 3 = 0 or x² - 2 = 0 <-- since if parentheses are multiplied and equal 0 then one set must be 0 for that to happen

x² + 3 can't be 0 since x² must be 0 or bigger (unless you have talked about "complex" numbers in your class.

so x² - 2 = 0.

this will happen when x² = 2

so x = either √2 or -√2

good luck

Erika2016-11-07T07:42:21Z

(3x-5)/4 +x/2 = a million/3 {(3x-5)*2 + (x*4)}/8 = a million/3 (6x-10+4x)/8 = a million/3 10x - 10 = 8/3 10x= (8/3)+10 10x= 38/3 x= 38/30 x= 19/15 or a million.26 * refers to multiplication / refers to branch