multiply 3 by the derivative of x^2

⇥Let's differentiate: ddx(x2)
⇥ⓘ The derivative of xn is nxn -1: ddx(x2) = 2x
⇥ 2x
Let's evaluate: 3·2x
ⅰ 3·2 = 6
▶Result:   6x

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