Question Simplify the expression a3−9a2+27a−27 Evaluate (a−3)3Use (a−b)3=a3−3a2b+3ab2−b3 to expand the expression a3−3a2×3+3a×32−33Solution a3−9a2+27a−27 Show Solution Find the roots a=3 Evaluate (a−3)3To find the roots of the expression,set the expression equal to 0 (a−3)3=0The only way a power can be 0 is when the base equals 0 a−3=0Move the constant to the right-hand side and change its sign a=0+3Solution a=3 Show Solution
Algebra
Calculus
Trigonometry
Matrix Algebra Calculus Trigonometry Matrix