Hiii everyone can anybody help me with this math question and explain? I really don’t get it and it’s apart of a big grade of mine please help ASAP!

What is the standard form of -5x^2+2x^4-11+x^3+3x

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Graph the system of equations. {6x−4y=−244x−8y=−32 use the line tool to graph the lines.