Question

the values of k for which the quadratic equation 2x^2+kx+2=0 has equal roots, is
A)4
B)+-4
C)-4
D)0​

Answer 1

Answer:

+-4

Step-by-step explanation:

for getting real and equal roots, the value of discriminant of an equation is 0.

D=b^2-4ac

0=k^2-4*2*2

0=k^2-16

k^2=16

k=+-4

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