Question Simplify the expression 4a−81 Evaluate (64×16a)−162Cancel out the common factor 16 4a−162Solution 4a−81 Show Solution Factor the expression 81(32a−1) Evaluate (64×16a)−162Cancel out the common factor 16 4a−162Cancel out the common factor 2 4a−81Solution 81(32a−1) Show Solution Find the roots a=321Alternative Form a=0.03125 Evaluate (64×16a)−162To find the roots of the expression,set the expression equal to 0 (64×16a)−162=0Cancel out the common factor 16 4a−162=0Cancel out the common factor 2 4a−81=0Move the constant to the right-hand side and change its sign 4a=0+81Add the terms 4a=81Multiply by the reciprocal 4a×41=81×41Multiply a=81×41Solution More Steps Evaluate 81×41To multiply the fractions,multiply the numerators and denominators separately 8×41Multiply the numbers 321 a=321Alternative Form a=0.03125 Show Solution