2,2 is 3,4 away from 5,6 and 3²+4²=25=5² so CD=5
The key: make the base of two side the same,,,
then: for the same base, the exponents are equal.
Answer:
-3x-7
Step-by-step explanation:
-3x and -6 aren't like terms, and neither are -3x and -1, so you leave -3x alone. You can combine -6 and -1. You simply add them as if they aren't negative and keep the negative sign. This results in -3x-7