Question:

Add the expressions (5x²y³z) and (-7x²y³z)  

a. -12x²y³z

b. -2x²y³z

c. 2x²y³z

d. 12x²y³z​

Answer:

b. -2x²y³z

Answer:

D. 12x²y³z

(5x²y³z) - (-7x²y³z)

↓ Remove unnecessary parentheses

5x²y³z - (-7x²y³z)

↓ When there is a - in front of an __ expression in Parentheses, change __ the sign of each term in the __ expression.

5x²y³z + 7x²y³z

↓ Collect like terms

12x²y³z

Step-by-step explanation:

Hope it helps✅T^T

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