Question Simplify the expression 9y2−30y+25 Evaluate (3y−5)2Use (a−b)2=a2−2ab+b2 to expand the expression (3y)2−2×3y×5+52Solution 9y2−30y+25 Show Solution Find the roots y=35Alternative Form y=1.6˙ Evaluate (3y−5)2To find the roots of the expression,set the expression equal to 0 (3y−5)2=0The only way a power can be 0 is when the base equals 0 3y−5=0Move the constant to the right-hand side and change its sign 3y=0+5Removing 0 doesn't change the value,so remove it from the expression 3y=5Divide both sides 33y=35Solution y=35Alternative Form y=1.6˙ Show Solution
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