Question

From the sum of x 2 + 7x and 2 – 6x2 , subtract the sum of x2 + xy – 5 and 5 + 9xy.

Answer 1

Answer:

A number used to multiply a variable. Example: 6z means 6 times z, and "z" is a variable, so 6 is a coefficient. Variables with no number have a coefficient of 1. Example: x is really 1x. Sometimes a letter stands in for the number.