Question Simplify the expression 25−10y+y2 Evaluate (5−y)2Use (a−b)2=a2−2ab+b2 to expand the expression 52−2×5y+y2Solution 25−10y+y2 Show Solution Find the roots y=5 Evaluate (5−y)2To find the roots of the expression,set the expression equal to 0 (5−y)2=0The only way a power can be 0 is when the base equals 0 5−y=0Move the constant to the right-hand side and change its sign −y=0−5Removing 0 doesn't change the value,so remove it from the expression −y=−5Solution y=5 Show Solution
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