Question Simplify the expression 9x2−24x+16 Evaluate (3x−4)2Use (a−b)2=a2−2ab+b2 to expand the expression (3x)2−2×3x×4+42Solution 9x2−24x+16 Show Solution Find the roots x=34Alternative Form x=1.3˙ Evaluate (3x−4)2To find the roots of the expression,set the expression equal to 0 (3x−4)2=0The only way a power can be 0 is when the base equals 0 3x−4=0Move the constant to the right-hand side and change its sign 3x=0+4Removing 0 doesn't change the value,so remove it from the expression 3x=4Divide both sides 33x=34Solution x=34Alternative Form x=1.3˙ Show Solution
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