Question

Solve the following equations for ????. Show your method and work. If no solution is possible, explain how

you know.
a. ????2 + 12???? + 18 = 7
b. ????2 + 2???? − 3 = 4
c. ????2 + 18???? + 73 = −9

Answer 1

Explanation:

Additive identity is 0.

step 3 used the additive identity property.