complete the factored form of the following perfect square trinomial polynomial. factored form 1.d²f²x²+2dfxyz+y²z² 2.9t²-36pt+36p² 3.144t²x²+24twxyz+w²y²z² 4.d²e²f²-32def+256 5.4p²-68pxy+298x²y² ​