HCF of x5+x4+1 and xs+x+1 is
A. x2+x-1
B. x2+x+1
C. x2-x+1
D. x2-x-1 ​

Which of the following equations are equivalent to -2m - 5m - 8 = 3 + (-7) + m? -15m = -4m -7m - 8 = m - 4 -3m - 8 = 4 - m m - 4 = -7m - 8 -8 - 7m = -4 + m -8 - 3m = 4 - m