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In each of the following, determine t...

In each of the following, determine the value of `k` for which the given value is a solution of the equation: `k x^2+2x-3=0,\ \ x=2` (ii) `3x^2+2k x-3=0,\ \ x=-1/2` (iii) `x^2+2a x-k=0,\ \ x=-a`

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