Question

If p=1, q=4, r=3, find pq + qr + rp.
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Answer 1

Answer:

• 1×4 +4×3 +3×1
• 4 + 12 +3
• 19 answer

Answer 2

pq + qr + rp = (1*4) + (4*3) + (3*1) = 4 + 12 + 3 = 19
Therefore the answer is 19