Question

сейчас нужно,помогите $(\sqrt{11} +3)*(\sqrt{11}+(-2))= ?$

Answer 1

$(\sqrt{11} +3)( \sqrt{11} + ( - 2)) = ( \sqrt{11} + 3)( \sqrt{11} - 2) = \sqrt{11} \times \sqrt{11} - \sqrt{11} \times 2 + 3 \times \sqrt{11} - 3 \times 2 = 11 - 2 \sqrt{11} + 3 \sqrt{11} - 6 = 5 + \sqrt{11}$