Question 1 (ii)
Find the roots of the quadratic equations by using the quadratic formula in the following question 5x2+13x+8=0.
Given equation is 5x2+13x+8=0
on comparing wit ax2 + bx + c = 0, we get
a = 5, b = 13 and c = 8
by quadratic formula, x=−b±√b2−4ac2a
=−(13)±√(13)2−4(5)(8)2(5)
=13±√169−16010=13±√910
=−13±310= −1010, −1610=−1,−85