a) (2a - b)² = (4a² - 4ab + b²)
b) (10m - n²)² = (100m² - 20mn² + n⁴)
c) (4x - 4²) = (16x² - 8x + 4⁴)
d)
e)

f)

A is the answer because if you calculate the answer correctly. that will be so.
40√3+432/7 is the answer
Hope this helps :D
Answer:
-5
Step-by-step explanation: