+85 Let a and b] be the roots of this polynomial. Therefore, a+b=13 and ab=4. Notice that a^2+ab+b^2. This means that the sum of the squares of the roots can be obtained by subtracting the term containing the product of a and b, so a^2+b^2=169-2(4)=161.
+85 Let a and b] be the roots of this polynomial. Therefore, a+b=13 and ab=4. Notice that a^2+ab+b^2. This means that the sum of the squares of the roots can be obtained by subtracting the term containing the product of a and b, so a^2+b^2=169-2(4)=161.
