Question Simplify the expression w2−14w+49 Evaluate (w−7)2Use (a−b)2=a2−2ab+b2 to expand the expression w2−2w×7+72Solution w2−14w+49 Show Solution Find the roots w=7 Evaluate (w−7)2To find the roots of the expression,set the expression equal to 0 (w−7)2=0The only way a power can be 0 is when the base equals 0 w−7=0Move the constant to the right-hand side and change its sign w=0+7Solution w=7 Show Solution
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