Question Simplify the expression a2−6a+9 Evaluate (a−3)2Use (a−b)2=a2−2ab+b2 to expand the expression a2−2a×3+32Solution a2−6a+9 Show Solution Find the roots a=3 Evaluate (a−3)2To find the roots of the expression,set the expression equal to 0 (a−3)2=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
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