Question

Find the value of k for which the 2x^2+kx+3=0 are real and equal

Answer 1

2x^2+kx+3=0
by comparing the given equation with ax^2+bx+c,
a=2,
b=k,
c=3
discriminant =b^2-4 ✖ a ✖ c
=k^2-4 ✖ 2 ✖ 3
=k^2-24
but the roots are real and equal,
k^2-24=0
then factorise this equation.
Hope it will help you
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