Answer:
6x⁴−6x³−120x²
Step-by-step explanation:
1. 5x6+7
2. 6x7+5
3. 5x7+6
Hope I helped :)
x = 8
6x - 5 = 5x + 3
6x - 5x = 3 + 5 (combining like-terms)
Hope this helps!