Question

-x^2-28x-27    cíu :(((((((

Answer 1

\(=-\left(x^2+28x+27\right)=-\left(x+1\right)\left(x+27\right)\)

Answer 2

\(-x^2-28x-27=-\left(x^2+28x+27\right)=-\left(x^2+27x+x+27\right)=-\left[x\left(x+27\right)+\left(x+27\right)\right]=-\left[\left(x+1\right)\left(x+27\right)\right]=-\left(x+1\right)\left(x+27\right)\)