"To derivate x^2 you just have to multiply x's coefficient by its exponent. In this case it would be 2 multiplied by one. Then you must subtract one to the exponent."
"Ok, so the answer to this one is 2x?" Noah says doubtfully.
I chuckle. "Correct. Now, that's just the basics of Calculus. For derivatives and integrals, you mostly have to memorize formulas."
"I'm good at memorizing." He says with a laugh.
"I know." I reply with a smile. It's only day two of studying for the contest. Noah's response has been really good. To be honest, I thought he would be tired of math after the first hour. Then again, it was his idea. He can't blame. "Do you want to solve some problems with this?" I ask, looking for exercises in the book over the table.
He shrugs and checks his phone
