Need help with simplifying this equation?

Science & Mathematics by Anonymous 2018-05-18 11:06:30

Social Science

1 answer

I have this equation 12(x⁴ - 1) - 25x(x² - 1) = 0 The solution is: (x-1) (x+1) (12x² - 25x + 12) = 0 I got this: (x-1) (x+1) (12x² - 25) = 0 Where does the +12 come from?

Anonymous

12(x^4-1)-25x(x^2-1)=0 => 12(x^2-1)(x^2+1)-25x(x^2-1)=0 => (x^2-1)[12(x^2+1)-25x]=0 => (x+1)(x-1)[12x^2+12-25x]=0 => (x+1)(x-1)(12x^2-25x+12)=0 is the right answer.