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MathematicsJAMB UTME1990

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Earlier discussion

2 older comments kept for context.

Kimberly

How did u get d final answers

Oluwaseun Adeyemi

x - 8\(\sqrt{x}\) + 15 = 0
x + 15 = 8\(\sqrt{x}\)

square both sides = (x + 15)2 = (8 \(\sqrt{x}\)2

x2 + 225 + 30x = 64x

x2 + 225 + 30x - 64x = 0

x2 - 34x + 225 = 0

(x - 9)(x - 25) = 0

x = 9 or 25