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**1. Homework Statement**

Find the number of integral values of 'k' for which the quadratic equation 2x^2 +kx - 4=0 will have two rational solutions.

**2. Homework Equations**

d=(b^2- 4ac)^(1/2)

**3. The Attempt at a Solution**

If discriminant is a perfect square, then the roots will be rational and unequal. but for how many values of 'k' starting from 2 itself will I check th discriminant to be a perfect square????