Question Simplify the expression x2−14x+49 Evaluate (x−7)2Use (a−b)2=a2−2ab+b2 to expand the expression x2−2x×7+72Solution x2−14x+49 Show Solution Find the roots x=7 Evaluate (x−7)2To find the roots of the expression,set the expression equal to 0 (x−7)2=0The only way a power can be 0 is when the base equals 0 x−7=0Move the constant to the right-hand side and change its sign x=0+7Solution x=7 Show Solution
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