Question

Check whether 5x²-6x-2=0 has equal roots

Answer 1

D=b^2-4ac
D=(-6)^2-4(5)(-2)
D=36-(20)(-2)
D=36+40
D=96
no it does not have equal roots

Answer 2

Hope it's clear :-) u must first sort out a b and c ie coefficients then apply to
b2 - 4 a c