Q. 104.3( 3 Votes )

# If one root of th

Two roots of any quadratic equation are α and β.

Here, one root is square of the other i.e α = β2

3x2 – kx – 81 = 0 compare this with ax2 – bx + c = 0

a = 3, b = –k and c = –81

αβ = –27

β2(β) = –27

β3 = –27

β3 = (–3)3

β = –3

now, we are going to apply in first equation

6 × 3 = k

k = 18

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