Answer:
64y² - 81
Step-by-step explanation:
(8y +9)(8y - 9)
64y² - 72y + 72y - 81
64y² - 81
The third diagram is the correct answer.
Answer:
which answer did you need help with
Step-by-step explanation:
i dont see what your inquiring about
Part i


Substituting,

Answer: -1
Part ii
I'm not sure that one's typed in correctly but I'll solve it as written.



We're not asked to simplify it so I wont. Substituting,

Answer: 59/306
Answer:
Step-by-step explanation:
divide by 3: x^2 = 4
Think you can finish that off now?