plz help will mark brainliest ....Given f(x)=5x2−2x and g(x)=3x2+x−4 .What is (f+g)(x) ?−2x2+3x−415x2−x+4​ 8x2−x−4 ​​ 2x2−3x+4 ​

It's the 3rd option. All your doing to me, is adding all the numbers straight down. I think you meant to write it like this: 8x² - x - 4