Common factor: 15x^2-10x, 3x^2+24x
Factor each polynomial completely: x^2+9x+8, x^2-x-12, x^2+4x-60, x^2-10x+25
Common factor: 5x
Factors of x^2+9x+8: (x+8)(x+1)
Factors of x^2-x-12: (x-4)(x+3)
Factors of x^2+4x-60: (x+10)(x-6)
Factors of x^2-10x+25: (x-5)(x-5) or (x-5)^2