Question Simplify the expression 4−4t+t2 Evaluate (2−t)(2−t)Multiply the terms (2−t)2Use (a−b)2=a2−2ab+b2 to expand the expression 22−2×2t+t2Solution 4−4t+t2 Show Solution Find the roots t=2 Evaluate (2−t)(2−t)To find the roots of the expression,set the expression equal to 0 (2−t)(2−t)=0Multiply the terms (2−t)2=0The only way a power can be 0 is when the base equals 0 2−t=0Move the constant to the right-hand side and change its sign −t=0−2Removing 0 doesn't change the value,so remove it from the expression −t=−2Solution t=2 Show Solution
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