Question

find the value of p+q-r when p=13,q=10,r=9​

Answer 1

(a) Add: p (p -9), a (q-r) and r (r-p)

Simplifying expressions

p (p -q)

= pxp-px 9 = p2 - pq?

Adding expressions

p? - pq + q? - qr

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q (q - r)

r (r-p)

=rxr-rxp = r? - rp

+ r? - rp

p? - pq + q? - qr + r - rp

Answer 2

Answer:

p + q - r when p = 13 , q =10 , r =9