Question Simplify the expression b2−6b+9 Evaluate (b−3)2Use (a−b)2=a2−2ab+b2 to expand the expression b2−2b×3+32Solution b2−6b+9 Show Solution Find the roots b=3 Evaluate (b−3)2To find the roots of the expression,set the expression equal to 0 (b−3)2=0The only way a power can be 0 is when the base equals 0 b−3=0Move the constant to the right-hand side and change its sign b=0+3Solution b=3 Show Solution
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