Question

simplify
(p+q) (p-q)+(p+r)(r-p)-(r^2 -q^2)​

Answer 1

Answer: 0

Step-by-step explanation : Given in the photo

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Answer 2

$\huge{\tt{\pink{Solution}}}$

$(p +q )( p- q) + (p +r )( r-p ) \\ - ( {r}^{2} - {q}^{2}) \\ \\ = ( {p}^{2} - {q}^{2} ) + ( {r}^{2} - {p}^{2} ) - ( {r}^{2} - {q}^{2} ) \\ \\ = {p}^{2} - {q}^{2} + {r}^{2} - {p}^{2} - {r}^{2} + {q}^{2} \\ \\ = 0$

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