Question

$\sqrt{ 45.8^{2} - 44.2^{2} }$
помогите)

Answer 1

$\sqrt{45.8^2-44.2^2}= \sqrt{(45.8-44.2)(45.8+44.2)}= \sqrt{1.6*90}= \sqrt{144}= \\ = \sqrt{12^2}=12$