Question

Find the value of p if (3, 2) is a solution of px – 5y + p2 = 0.

Answer 1

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Substitute the x and y values in:

p^2 + 3p - 5(2) = 0

p^2 + 3p - 10 = 0

Factorise this:

(p - 2)(p + 5)

p = 2

p = -5

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