Q1 of 23 Page 1

Attempt any five sub-question from the following:

If a = 1, b = 8 and c = 15, then find the value of b2 – 4ac.

Given: a = 1, b = 8, c = 15

b2 – 4ac = 82 – 4 × 1 × 15


= 64 – 60


∴ b2 – 4ac = 4


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