Question

find the root of equation 5x^2 - 6x - 2 = 0 by quadratic formula

Answer 1

Step-by-step explanation:

5x2−6x−2=0

D=b2−4ac=36−4(5)(−2)=76

x=2a−b±D=10−(−6)±76=106±76=53±19

5x2−6x−2=5(53+19)2−6(53+19)−2

=59+19+619−5(18+619)−2 

=2−2=0