Question

срочно!!! спростити вираз

Answer 1

(2√7+3)^2=4x7+2x2√7x3+9=28+12√7+9=37+12√7

Answer 2

$(2\sqrt7+3)^2=4\cdot 7+2\cdot 2\sqrt7\cdot 3+9=37+12\sqrt7$