We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website.
Please click on "Accept cookies" if you agree to the setting of cookies. Cookies that do not require consent remain unaffected by this, see
cookie policy and privacy policy.
DECLINE COOKIES

#1**+1 **

x^4 - 2x^3 - 103x^2 + 200x + 300

Split -103x^2 into -3x^2 - 100x^2 and we have

x^4 - 2x^3 - 3x^2 - 100x^2 + 200x + 300 this factors as

x^2 ( x^2 - 2x - 3) - 100 (x^2 - 2x - 3 )

(x^2 -100) ( x^2 - 2x - 3)

(x + 10) ( x - 10) (x - 3) ( x + 1)

Setting each factor to 0 and solving for x, the roots are x = -10, -1, 3 and 10

CPhill Oct 23, 2017