2 + pq
6
False. In order for the line PQ to lie in plane B, then both P and Q must lie in plane B.
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|PQ|
QPR is congruent to SPR PR is perpendicular to QPS PQ =~ QR PT =~ RT
T is the midpoint of PQangle PTR = 90 degreesRS _l_ PQPT = QT
2 + pq
6
Is PQ |_ RS
z=pq
3
p(q + r) = pq + pr is an example of the distributive property.
PQ ST
If you are working with real numbers, or even complex numbers, pq is the same as qp, so the result is the same as 2pq. If you use some multiplication that is NOT commutative (such as, when you multiply matrices), you can't simplify the expression.
False. In order for the line PQ to lie in plane B, then both P and Q must lie in plane B.
8(p + q)(p^2 - pq + q^2)