The sum of –7pq and 2pq is

Question:

The sum of –7pq and 2pq is

(a) –9pq

(b) 9pq

(c) 5pq

(d) – 5pq

Solution:

(d) – 5pq

The given two monomials are like terms.

Then sum of -7pq and 2pg = – 7pq + 2pq

= (-7 + 2) pq

= -5pq

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