public function testSolveInverseBEqualsX(array $A, array $b, array $x, array $zeros)
{
$A = MatrixFactory::create($A);
$A⁻¹ = $A->inverse();
$x = (new Vector($x))->asColumnMatrix();
$b = new Vector($b);
// A⁻¹b
$A⁻¹b = $A⁻¹->multiply($b);
$this->assertEquals($x, $A⁻¹b, '', 0.001);
}