Question

 Thu gọn đa thức sau:

\(F=\left(x-1\right)^3-x^2\left(x-3\right)\)

Answer 1

\(F=\left(x-1\right)^3-x^2\left(x-3\right)\)

\(=x^3-3x^2+3x-1-x^3-3x^2\)

\(=\left(x^3-x^3\right)-\left(3x^2-3x^2\right)+3x-1\)

\(=3x-1\)

Answer 2

F = (x - 1)³ - x²(x - 3) = x³ - 3x² + 3x - 1 - x³ + 3x = -3x² + 6x - 1

Answer 3

sorry, mik làm lại nhé ^^

F = (x - 1)³ - x²(x - 3) = x³ - 3x² + 3x - 1 - x³ + 3x² = 3x - 1