book Maths Puzzle Numerical Ability

what is the discriminant in the quadratic equation x2 + 11x + 121 = x + 96

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Can someone help me with this problem?

What would be the least common multiple of 3, 6, and 9.

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Sher in triangle abd c is on bd, the length of ad is 6 inches, and sin d=0.8. how many inches long is cd