Identify common factor: Identify the common factor in all terms.The polynomial is −5x2−25x−30. All terms have a common factor of −5.
Factor out common factor: Factor out the common factor.Factor out −5 from each term to get −5(x2+5x+6).
Factor quadratic expression: Factor the quadratic expression.Now we need to factor the quadratic x2+5x+6. We are looking for two numbers that multiply to 6 (the constant term) and add up to 5 (the coefficient of the x term).The numbers 2 and 3 satisfy these conditions because 2×3=6 and 2+3=5.
Write factored form: Write the factored form of the quadratic.The factored form of x2+5x+6 is (x+2)(x+3).
Combine with common factor: Combine the factored quadratic with the common factor.The final factored form of the original polynomial is −5(x+2)(x+3).