Q5 of 83 Page 85

Solve the following equations using the general formula:

x2 — 3x — 2 = 0

Comparing equation x2 — 3x — 2 = 0 with ax2 + bx + c = 0 we get


a = 1, b = – 3 and c = – 2


Discriminant (D) = b2 – 4ac


⇒ D = (– 3)2 – 4(1)(– 2)


⇒ D = 9 + 8


⇒ D = 17


D > 0 implies roots are real and distinct and given by




Therefore and


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