Question Simplify the expression 211a−1 Evaluate 211a−1−0Solution 211a−1 Show Solution Factor the expression 21(11a−2) Evaluate 211a−1−0Removing 0 doesn't change the value,so remove it from the expression 211a−1Solution 21(11a−2) Show Solution Find the roots a=112Alternative Form a=0.1˙8˙ Evaluate 211a−1−0To find the roots of the expression,set the expression equal to 0 211a−1−0=0Removing 0 doesn't change the value,so remove it from the expression 211a−1=0Move the constant to the right-hand side and change its sign 211a=0+1Removing 0 doesn't change the value,so remove it from the expression 211a=1Multiply by the reciprocal 211a×112=1×112Multiply a=1×112Solution a=112Alternative Form a=0.1˙8˙ Show Solution