Answer:
12
Step-by-step explanation:
34x6=207
207÷17=12.17
12 books
Answer:
x = -3
Step-by-step explanation:
12 - 4x-5x = 39
Combine like terms
12 - 9x = 39
subtract 12 from each side
12 -9x-12 = 39-12
-9x = 27
Divide by -9
-9x/-9 = 27/-9
x = -3
Hi,
Solving:

Answer: 1
Hope this helps.
If you have any questions about the answer comment below and I'll reply.
r3t40
Step-by-step explanation:
x³ + 10x² + 25x
= x(x² + 10x + 25)
= x(x + 5)².