Problem
ALG-B1-M11-P007 Integer roots
#7
★★☆☆☆ Level 2 of 5
Find the integer roots of \(x^3-3x^2-4x+12\).
Try grouping.
\(x^3-3x^2-4x+12=x^2(x-3)-4(x-3)=(x-3)(x-2)(x+2)\). The roots are \(3,2,-2\).
Strategy: grouping instead of full checking.