Question

Quadratic Equation.
t^2-t-4=____

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Answer 1

==> t² - t - 4

On comparing,

a = 1 ; b = -1 ; c = -4

Discriminant, D = b² - 4ac

==> D = (-1)² - 4×1×-4

==> D = 1 + 16

==> D = 17

We know,

x = -b ± √D / 2a

==> x = -(-1) ± √17 / 2

==> x = 1 ± √17 / 2

x = 1 + √17 / 2

or

x = 1 - √17 / 2