Answer:
-9x² + 64
Explanation:
First rearrange the terms:
(8-3x)(8+ 3x)
(-3x+8)(8+3x)
(-3x+8)(8+ 3x)
(-3x+8)(3x+8)
Then distribute:
(-3x+8)(3x+8)
(-3x+8)(3x+8)-3x(3x+8) + 8(3x+8)
-9x2-24x+8(3x+8)
-9x² - 24x+8(3x+8)
-9x² - 24x+8(3x+8)-9x² - 24x + 24x + 64
Combine like terms:
-9x²-24x + 24x + 64
Answer: -9x²+64