Simplify the expression 4(x − 5)(x2 + x + 2).
4x3 − 4x2 − 3x − 10
4x3 − 16x2 − 12x − 40
4x3 + 12x2 − 40x − 40
4x3 − 40x2 + 12x − 40

  4x^3 − 16x^2 − 12x − 40

Step-by-step explanation:

= 4(x)(x^2 +x +2) +4(-5)(x^2 +x +2) . . . use the distributive property

= 4x^3 +4x^2 +8x -20x^2 -20x -40 . . . . and again

= 4x^3 -16x^2 -12x -40

b. the decimal could be two-tenths.

step-by-step explanation: