Question

derivada y= ×^2 cos x ?

Answer 1

$y=\:x^2\cdot cos\:\left(x\right)\\\\\frac{d}{dx}\left(x^2\cdot \:cos\left(x\right)\right)\\x^2\cdot \frac{d}{dx}\left(cos\left(x\right)\right)+\frac{d}{dx}\left(x^2\right)\cdot cos\left(x\right)\\x^2\cdot \left(-sen\left(x\right)\right)+2x\cdot cos\left(x\right)\\\boxed{\bold{-x^2\cdot sen\left(x\right)+2x\cdot cos\left(x\right)}}$