Identify the quadratic expression: Identify the quadratic expression to be factored.The given expression is −4x2−28x−48.
Factor out the greatest common factor: Factor out the greatest common factor (GCF) from the quadratic expression.The GCF of −4x2, −28x, and −48 is −4.Factoring out −4, we get −4(x2+7x+12).
Rewrite the quadratic expression: Rewrite the quadratic expression inside the parentheses in factored form.The quadratic expression x2+7x+12 can be factored into (x+3)(x+4).
Combine the GCF with the factored form: Combine the GCF with the factored form of the quadratic expression.The factored form of the original expression is −4(x+3)(x+4).