Calculation: TqPuIt - 1

s^² =
x1^²* p1+ x2^²* p2+ x3^²* p3- x__v^²

s^² = x1^²* p1+ x2^²* p2+ x3^²* p3- x__v^²$$s^{2}$$ = $$x1^{2}\cdot p1+x2^{2}\cdot p2+x3^{2}\cdot p3-x_{v}^{2}$$

s^² = p1* x1^²+ p2* x2^²+ p3* x3^²- x__v^²$$s^{2}$$ = $$p1\cdot x1^{2}+p2\cdot x2^{2}+p3\cdot x3^{2}-x_{v}^{2}$$

s = saknis(

p1* x1^²+ p2* x2^²+ p3* x3^²- x__v^²)$$s$$ = $$\sqrt {p1\cdot x1^{2}+p2\cdot x2^{2}+p3\cdot x3^{2}-x_{v}^{2}}$$