What is the integral of zsqrt(z-4) ?

The integral of zsqrt(z-4) is 2/5 (z-4)^{5/2}+8/3 (z-4)^{3/2}+C

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integral of zsqrt(z-4)

\int z z - 4 d z

\frac{2}{5} (z - 4)^{\frac{5}{2}} + \frac{8}{3} (z - 4)^{\frac{3}{2}} + C

Solution steps

\int z z - 4 d z

Apply u-substitution

: \int (u + 4) u d u

= \int (u + 4) u d u

Expand

(u + 4) u : u^{\frac{3}{2}} + 4 u

= \int u^{\frac{3}{2}} + 4 u d u

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int u^{\frac{3}{2}} d u + \int 4 u d u

\int u^{\frac{3}{2}} d u = \frac{2}{5} u^{\frac{5}{2}}

\int 4 u d u = \frac{8}{3} u^{\frac{3}{2}}

= \frac{2}{5} u^{\frac{5}{2}} + \frac{8}{3} u^{\frac{3}{2}}

Substitute back

u = z - 4

= \frac{2}{5} (z - 4)^{\frac{5}{2}} + \frac{8}{3} (z - 4)^{\frac{3}{2}}

Add a constant to the solution

= \frac{2}{5} (z - 4)^{\frac{5}{2}} + \frac{8}{3} (z - 4)^{\frac{3}{2}} + C

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What is the integral of zsqrt(z-4) ?
The integral of zsqrt(z-4) is 2/5 (z-4)^{5/2}+8/3 (z-4)^{3/2}+C