Question Simplify the expression y2−90y Evaluate y2−10y×9Solution y2−90y Show Solution Factor the expression y(y−90) Evaluate y2−10y×9Multiply the terms y2−90yRewrite the expression y×y−y×90Solution y(y−90) Show Solution Find the roots y1=0,y2=90 Evaluate y2−10y×9To find the roots of the expression,set the expression equal to 0 y2−10y×9=0Multiply the terms y2−90y=0Factor the expression More Steps Evaluate y2−90yRewrite the expression y×y−y×90Factor out y from the expression y(y−90) y(y−90)=0When the product of factors equals 0,at least one factor is 0 y=0y−90=0Solve the equation for y More Steps Evaluate y−90=0Move the constant to the right-hand side and change its sign y=0+90Removing 0 doesn't change the value,so remove it from the expression y=90 y=0y=90Solution y1=0,y2=90 Show Solution