Approximate to the nearest tenth the real zeros of f(x)=-5+9+12x+2

To the nearest tenth the zeroes are:


EXPLANATION



The constant term is 2, and the coefficient of the highest degree is -5 so test all rational factors of



These are;









Good for us the very first one is a root. Therefore,



is a root. These also means that



is a factor. Therefore we perform long division to find the other factors as follows.

We can now factor the polynomial as,





This implies that,



Which gives us



Or





We complete the square to obtain,





Taking square root of both sides gives;



This implies