Question

Media aritmetica la
x = radical din 20 + radical 7
y= 2radical din 45 - radical 7

Answer 1

[tex]\it \sqrt{20} = \sqrt{4\cdot5} = 2\sqrt5 \\\;\\ \sqrt{45} = \sqrt{9\cdot5} =3\sqrt5 \\\;\\ m_a = \dfrac{2\sqrt5+\sqrt7+6\sqrt5-\sqrt7}{2} = \dfrac{8\sqrt5}{2} =4\sqrt5[/tex]

Answer 2

Media aritmetica  =  a*b/2

x=√20+√7
y=2√45-√7

√20 = 2√5
√45 = 3√5

M.a = x*y/2 = 2√5+√7+6√5-√7/2 = 2√5+6√5/2 = 8√5/2 = 4√5