Question

найдите значения выражения 10ab+(-5a+b)^2 при a=√2,b=√5

Answer 1

$10(\sqrt{2})b+(-5\sqrt{2} +b)^2$

$10(\sqrt{2} )(\sqrt{5} )+(-5\sqrt{2} +\sqrt{5} )^2$

$10(\sqrt{2})(\sqrt{5})+(-5\sqrt{2}+\sqrt{5} )^2$

$10\sqrt{10} +(55-10\sqrt{10} )$

$55$