Question Simplify the expression 8−12x+6x2−x3 Evaluate (2−x)3Use (a−b)3=a3−3a2b+3ab2−b3 to expand the expression 23−3×22x+3×2x2−x3Solution 8−12x+6x2−x3 Show Solution Find the roots x=2 Evaluate (2−x)3To find the roots of the expression,set the expression equal to 0 (2−x)3=0The only way a power can be 0 is when the base equals 0 2−x=0Move the constant to the right-hand side and change its sign −x=0−2Removing 0 doesn't change the value,so remove it from the expression −x=−2Solution x=2 Show Solution
Algebra
Calculus
Trigonometry
Matrix Algebra Calculus Trigonometry Matrix