public function testAdjugate() { $matrix = new Matrix([[3, 0, 2], [2, 0, -2], [0, 1, 1]]); $adjugated = $matrix->adjugate(); $result = new Matrix([[2, 2, 0], [-2, 3, 10], [2, -3, 0]]); $this->assertTrue($adjugated->equals($result)); }