Question Simplify the expression 4−18ϕ Evaluate 4−ϕ×18Solution 4−18ϕ Show Solution Factor the expression 2(2−9ϕ) Evaluate 4−ϕ×18Use the commutative property to reorder the terms 4−18ϕSolution 2(2−9ϕ) Show Solution Find the roots ϕ=92Alternative Form ϕ=0.2˙ Evaluate 4−ϕ×18To find the roots of the expression,set the expression equal to 0 4−ϕ×18=0Use the commutative property to reorder the terms 4−18ϕ=0Move the constant to the right-hand side and change its sign −18ϕ=0−4Removing 0 doesn't change the value,so remove it from the expression −18ϕ=−4Change the signs on both sides of the equation 18ϕ=4Divide both sides 1818ϕ=184Divide the numbers ϕ=184Solution ϕ=92Alternative Form ϕ=0.2˙ Show Solution