Question Simplify the expression −9+18z Evaluate −3(3−6z)Apply the distributive property −3×3−(−3×6z)Multiply the numbers −9−(−3×6z)Multiply the numbers −9−(−18z)Solution −9+18z Show Solution Factor the expression −9(1−2z) Evaluate −3(3−6z)Factor the expression −3×3(1−2z)Solution −9(1−2z) Show Solution Find the roots z=21Alternative Form z=0.5 Evaluate −3(3−6z)To find the roots of the expression,set the expression equal to 0 −3(3−6z)=0Change the sign 3(3−6z)=0Rewrite the expression 3−6z=0Move the constant to the right side −6z=0−3Removing 0 doesn't change the value,so remove it from the expression −6z=−3Change the signs on both sides of the equation 6z=3Divide both sides 66z=63Divide the numbers z=63Solution z=21Alternative Form z=0.5 Show Solution