Question Simplify the expression 9−30x+25x2 Evaluate (3−5x)2Use (a−b)2=a2−2ab+b2 to expand the expression 32−2×3×5x+(5x)2Solution 9−30x+25x2 Show Solution Find the roots x=53Alternative Form x=0.6 Evaluate (3−5x)2To find the roots of the expression,set the expression equal to 0 (3−5x)2=0The only way a power can be 0 is when the base equals 0 3−5x=0Move the constant to the right-hand side and change its sign −5x=0−3Removing 0 doesn't change the value,so remove it from the expression −5x=−3Change the signs on both sides of the equation 5x=3Divide both sides 55x=53Solution x=53Alternative Form x=0.6 Show Solution
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