Question Simplify the expression 4σ2−120σ Evaluate σ2×4−120σSolution 4σ2−120σ Show Solution Factor the expression 4σ(σ−30) Evaluate σ2×4−120σUse the commutative property to reorder the terms 4σ2−120σRewrite the expression 4σ×σ−4σ×30Solution 4σ(σ−30) Show Solution Find the roots σ1=0,σ2=30 Evaluate σ2×4−120σTo find the roots of the expression,set the expression equal to 0 σ2×4−120σ=0Use the commutative property to reorder the terms 4σ2−120σ=0Factor the expression More Steps Evaluate 4σ2−120σRewrite the expression 4σ×σ−4σ×30Factor out 4σ from the expression 4σ(σ−30) 4σ(σ−30)=0When the product of factors equals 0,at least one factor is 0 4σ=0σ−30=0Solve the equation for σ σ=0σ−30=0Solve the equation for σ More Steps Evaluate σ−30=0Move the constant to the right-hand side and change its sign σ=0+30Removing 0 doesn't change the value,so remove it from the expression σ=30 σ=0σ=30Solution σ1=0,σ2=30 Show Solution