Question Simplify the expression 16z2−24z+9 Evaluate (4z−3)2Use (a−b)2=a2−2ab+b2 to expand the expression (4z)2−2×4z×3+32Solution 16z2−24z+9 Show Solution Find the roots z=43Alternative Form z=0.75 Evaluate (4z−3)2To find the roots of the expression,set the expression equal to 0 (4z−3)2=0The only way a power can be 0 is when the base equals 0 4z−3=0Move the constant to the right-hand side and change its sign 4z=0+3Removing 0 doesn't change the value,so remove it from the expression 4z=3Divide both sides 44z=43Solution z=43Alternative Form z=0.75 Show Solution
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