Substitute u: Now, let's substitute u=2x−6, which means du=21dx or dx=2du. The integral becomes ∫4−u21⋅2du.
Simplify integral: Simplify the integral to get 2∫4−u21du. Recognize that this is the integral form of arcsin(2u), since the derivative of arcsin(2u) is 1−(2u)21.
Recognize integral form: Now, integrate to get 2⋅arcsin(2u)+C.
Integrate to get: Substitute back for u to get 2⋅arcsin(4x−6)+C. But wait, there's a mistake here. The integral should be arcsin(2u) without the 2 in front, since we already accounted for the dx=2du substitution.
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