# Distance between (8,-7,-4) and (9,2,2)?

Distance between (8,-7,-4) and (9,2,2)?
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Note: The distance formula in 3D is
$D=\sqrt{{\left({x}_{1}-{x}_{2}\right)}^{2}+{\left({y}_{1}-{y}_{2}\right)}^{2}+{\left({z}_{1}-{z}_{2}\right)}^{2}}$
We are given ordeblack triplet in x,y,z , as follow
$\left(8,-7,-4\right)\phantom{\rule{1ex}{0ex}}\text{and}\phantom{\rule{1ex}{0ex}}\left(9,2,2\right)$
$D=\sqrt{{\left(8-9\right)}^{2}+{\left(-7-2\right)}^{2}+{\left(-4-2\right)}^{2}}$
$D=\sqrt{{\left(-1\right)}^{2}+{\left(-9\right)}^{2}+{\left(-6\right)}^{2}}$
$D=\sqrt{\left(1\right)+\left(81\right)+\left(36\right)}$
$D=\sqrt{118}\cong 10.86$