Question

find d/dx (2cosx+2xsinx-x^2cosx)

Answer 1

-2sinx+2sinx+2xcosx-2xcosx+x^2sinx

Answer 2

derivative of sinx is cosx. But derivative of cosx=-sinx

Answer 3

then

Answer 4

then differentiate each

Answer 5

note that x*sinx needs product rule

Answer 6

that is, example: \[(a*b)\prime=b*a \prime+a*b\]

Answer 7

there is a prime sign at the end at b

Answer 8

ok?

Answer 9

Yaaa