Difference of squares. #sat #psat #act #math #tiktokmath #testprep #1600 #yourbummymathtutor #StrikeAPosay #OutPizzaTheHut #LoveStory #DejaTuHuella #a

Alright, question two. Find 2,011 squared minus 2,010 squared. So what you most of you guys might do is you guys might multiply 2,011 squared and actually square that and then 2,010 squared. But we don't want to do that because as you can see or something squared minus something squared. This is called the difference of squares, right? So x squared minus y squared is equal to x plus y times x minus y. That's the difference of squares. So in this case, what is the value of x? It's going to be 2,011 minus, I mean plus 2,010 times 2,011 minus 2,010. And what is this equal to? When you add these two numbers, that gives you 4,021. And over here, that gives you 2,011 minus 2,010 is 1. What's 4,021 times 1? That's just equal to 4,021. Meaning your answer has to be C.