P= -1
Q = 1
R = 2
PQR - 6PQR + 7Q*2 - 4P*2
The answer in book is 13
but I don't know how
please give me explanation
Answers
Answered by
1
Answer:
PQR-6PQR+7Q×2-4P×2
1×1×2-6×1×1×2+7×1×2-4×1×2
2-12+14-8
-10+6
-4 is correct answer
Answered by
2
Answer:
PQR-6PQR+7Q^2-4P^2
=-5PQR++7Q^2-4P^2
=-5(-1)(1)(2)+7(1)^2-4(-1)^2
=10+7-4
=13
Step-by-step explanation:
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