1.1 Systems of linear equations

Is $$\sqrt{5}x_1+4.6x_2+\frac{1}{2}x_3=-5$$ a __linear equation?__

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Feb 15, 2021

1.1 Systems of linear equations

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Is $$\sqrt{5}x_1+4.6x_2+\frac{1}{2}x_3=-5$$ a __linear equation?__

**Yes**. A coefficient or a constant can be an irrational, a rational, or a negative number.

Is $$6x_1 - 4x_2 + x_3 = 0$$ a __linear equation?__

Yes. Even if $$b=0$$, the equation is still __linear.__