There are 6 combos that he can use
I believe the answer is 46.
Remember "PEMDAS" when doing equations like these :)
a) (2a - b)² = (4a² - 4ab + b²)
b) (10m - n²)² = (100m² - 20mn² + n⁴)
c) (4x - 4²) = (16x² - 8x + 4⁴)
d)
e)
f)
Answer:
x = -1
Step-by-step explanation:
2x + 5x = -7
7x = -7
x = -1