Answer:
Step-by-step explanation:

Answer:
-9, 9
Step-by-step explanation:
a² − 8ab + 16b² = 81
(a - 4b)² = 81 Wrote the left-hand side as a square
a - 4b = ±9 Took the square root of each side
All values of a - 4b are -9 and +9.
Answer:
x=0
Step-by-step explanation:
move all terms to the left. Then add all the numbers together. Then multiply parenthesis to get rid of them finally add all numbers together
Answer:
y equal -7
Step-by-step explanation:
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