Question

√2 7/9 -5√1,96 обчисліть

Answer 1

Объяснение:

корень (2 7/9)-5корень (1,96)=

=корень (25/9)-5корень(1 96/100)=

=5/3 - 5корень(1 24/25)=

=5/3 - 5корень (49/25)=

=5/3 - 5×7/5=5/3 - 7= 5/3-21/3=

= - 16/3= - 5 1/3

Answer 2

$\displaystyle\bf\\\sqrt{2\frac{7}{9} } -5\sqrt{1,96} =\sqrt{\frac{25}{9} } -5\sqrt{1,4^{2} } =\sqrt{\Big(\frac{5}{3}\Big)^{2} } -5\cdot1,4=\\\\\\=\frac{5}{3} -7=1\frac{2}{3} -7=-5\frac{1}{3}$