Answer
-14x$^4$-13x$^2$+16x
Work Step by Step
Negate the first given trinomial and then combine like terms with the second trinomial.
-(x$^4$+7x$^2$-11x)+(-13x$^4$-6x$^2$+5x)
-x$^4$-7x$^2$+11x-13x$^4$-6x$^2$+5x
(-x$^4$-13x$^4$)+(-7x$^2$-6x$^2$)+(11x+5x)
-14x$^4$-13x$^2$+16x
