Skip to content / Đến nội dung
ThichHocToan.com

1979 AMC 12 Question 4

AMC12 · 1979 AMC 12

Question 4

For all real numbers $x,$ $x[x\{x(2-x)-4\}+10]+1$ equals
  1. $-x^4+2x^3+4x^2+10x+1$
  2. $-x^4-2x^3+4x^2+10x+1$
  3. $-x^4-2x^3-4x^2+10x+1$
  4. $-x^4-2x^3-4x^2-10x+1$
  5. $-x^4+2x^3-4x^2+10x+1$