Question 255015
1)
x^3 + 8x^2 + 2x + 16 
=x^3+2x+8x^2+16
=x(x^2+2)+8(x^2+2)
=(x^2+2)(x+8)
2)2bc +4b - 5c - 10
=2b(c+2)-5(c+2)
=(c+2)(2b-5)