4x^2-72x-225=0
4x^2-72x-225=0 this will not factor ..... using the on-site solver, we have.....
4×x2−72×x−225=0⇒{x=−(3×√61−18)2x=(3×√61+18)2}⇒{x=−2.7153745138599816x=20.7153745138599816}
alright lets crush this other base here
4×x2−72×x−225=0
first lets simplify x
4×x2=4×x×4×x=16×x
16×x−72×x=−(56×x)
now its:
−56×x−225=0
add 225 to both sides:
−(56×x)=225
divide 56 both sides:
−x=−4.0178571428571429
+2973 
