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Addition and Subtraction of Algebraic Expression

a Add :p p - ...

Question

Question 5(a)
Add :p ( p - q ), q (q - r ) and r (r - p ).

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Solution

$p (p - q) + q (q - r) + r (r - p) = p^{2} - p q + q^{2} - q r + r^{2} - r p$
$= p^{2} + q^{2} + r^{2} - p q - q r - r p$

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Addition and Subtraction of Algebraic Expression

Standard VIII Mathematics