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WAEC Mathematics 2022 Paper

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Question : 16

Total: 47

What value of p will make (x

{}^2

- 4x + p) a perfect square?

-2
16
4
-8

Solution:

(x ${}^2$ - 4x + p)

Use the coefficient of the middle variable(-4x)

= ( $\; \frac{-4}{2}$ ) ${}^2$

= (-2) ${}^2$

= 4

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