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1.solve the quad eqn 2x² + kx - k²=0 for x.

2.if -5 is a root of the quad eqn 2x² + px -15=0 and the quad eqn p(x² + x) +k =0 has equal roots, find the value of k.

3.if the eqn (1 + m²)x² + 2mcx + (c² - a² ) =0 has equal roots, then prove that c² = a²(1 + m²).

4.Determine k so that (k² + 4k +8) , (2k² +3k +6) and (3k² +4k +4) are in A.P.

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by simi

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