Question Simplify the expression 9z2−144z Evaluate 9z2−18z×8Solution 9z2−144z Show Solution Factor the expression 9z(z−16) Evaluate 9z2−18z×8Multiply the terms 9z2−144zRewrite the expression 9z×z−9z×16Solution 9z(z−16) Show Solution Find the roots z1=0,z2=16 Evaluate 9z2−18z×8To find the roots of the expression,set the expression equal to 0 9z2−18z×8=0Multiply the terms 9z2−144z=0Factor the expression More Steps Evaluate 9z2−144zRewrite the expression 9z×z−9z×16Factor out 9z from the expression 9z(z−16) 9z(z−16)=0When the product of factors equals 0,at least one factor is 0 9z=0z−16=0Solve the equation for z z=0z−16=0Solve the equation for z More Steps Evaluate z−16=0Move the constant to the right-hand side and change its sign z=0+16Removing 0 doesn't change the value,so remove it from the expression z=16 z=0z=16Solution z1=0,z2=16 Show Solution