1.

Find the value of k for which is the equation 2x^2+8kx+8=0 has equal roots​

Answer»

K = +1 or -1
b^2 - 4ac = 0
(8K)^2 - 4(2)(8) = 0
64k^2 - 64 = 0
k^2 - 1 = 0
(k-1)(k+1)=0
k = +1 or -1


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