Find all values of $x$ such that $x^2 - 5x + 4 = -x^2 - 25x - 14$. If you find more than one value, then list your solutions, separated by commas.
First, let's move all terms to one side and combine all like terms.
We get
x2+10x+9=0
We can put this into factored form to find x. We get
(x+9)(x+1)=0
From this, we know that
x=−1x=−9
So our final answer is -1 and -9.
Thanks! :)