Question Simplify the expression 1−4a+4a2 Evaluate (1−2a)2Use (a−b)2=a2−2ab+b2 to expand the expression 12−2×1×2a+(2a)2Solution 1−4a+4a2 Show Solution Find the roots a=21Alternative Form a=0.5 Evaluate (1−2a)2To find the roots of the expression,set the expression equal to 0 (1−2a)2=0The only way a power can be 0 is when the base equals 0 1−2a=0Move the constant to the right-hand side and change its sign −2a=0−1Removing 0 doesn't change the value,so remove it from the expression −2a=−1Change the signs on both sides of the equation 2a=1Divide both sides 22a=21Solution a=21Alternative Form a=0.5 Show Solution
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