Question

(a) Add: p (p -q), q (q - r)and r (r-p) 5. (b)
Add: 2x (z - x - y) and 2y
(z -y-x







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Answer 1

Step-by-step explanation:

1) p(p-q) + q(q-r) + r(r-p)

$= {p}^{2} - pq + {q}^{2} - qr + {r}^{2} - rp$

$= {p}^{2} + {q}^{2} + {r}^{2} - pq - qr - rp$

2) 2x(z-x-y) + 2y(z-y-x)

$= 2xz - 2 {x}^{2} - 2xy + 2yz - 2 {y}^{2} \\ - 2xy$