Ответ:
1) (x+3)² + (x+3)·(x-3) - √3·(√12x + √3) = x² + 6x +9 + x² -9 - √36x + √9 =
= 2x² +6x -6x + 3 = 2x² + 3
2) x = -√2, 2x² + 3 = 2·(-√2)² + 3 = 2·2 + 3 = 7
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Ответ:
1) (x+3)² + (x+3)·(x-3) - √3·(√12x + √3) = x² + 6x +9 + x² -9 - √36x + √9 =
= 2x² +6x -6x + 3 = 2x² + 3
2) x = -√2, 2x² + 3 = 2·(-√2)² + 3 = 2·2 + 3 = 7