Question

if a and b are the zero most of the polynomial x² + 6+ 5 then (a+ b)² =_______
a - 36
b - 6
c - 6
d 36 ​

Answer 1

Answer:

As we know the sum of the roots of a quadratic equation is equal to the negation of the coefficient of the second term, divided by the leading coefficient. The product of the roots of a quadratic equation is equal to the constant term (the third term), divided by the leading coefficient.

∴ a+b=5 , ab=6

=>a+b−3ab=5−3×6=−13