Answer:
Factoring
Step-by-step explanation:
(x+4)² = 15
x² + 8x + 16 = 15
x² + 8x + 1 = 0

I hope this helps you :)
Can you translate so I can help you out
I think the answer is 12 because 3 times 4 is 12
Step-by-step explanation:
5×a×5×a
collect like terms
5×5×a×a
25×a^2
25a^2