75 can someone me? (ignore my work, i'm dumb )

All you're doing is combining like terms. Use pemdas and combine terms.

Use can use the pemdas formula to help you  and combine terms.

~batmans wife dun dun dun...aka ~serenitybella

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.