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Q: Do linear equations contain x squared?

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Two equations: a linear one in y and a quadratic in x.

no, because xx=x squared, and x squared is not linear

YES, all linear equations have x-intercepts. because of the x, y has to be there 2!

It is x-3.

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Linear equations come in the form y=mx+b or y=mx-b, where x and y are the variables x and y and b is a constant (like 3). All other equations are non-linear. Linear equations has a power of 1! as long as the X has a power of 1, it is a linear equation.

No, to be linear, both the power of x and y need to be 1. Since x is squared, the power of x is 2.

y = x

Yes, the graph of a linear equation can be a line. There are special cases, sometimes trivial ones like y=y or x=x which are linear equations, but the graph is the entire xy plane. The point being, linear equations most often from a line, but there are cases where they do not.

If you already know that x = -3 and y = 5 what linear equations are you wanting to solve?

Linear equations can be written as y = mx + b. Any other function would be non-linear. Some linear equations are: y = 3x y = 2 y = -2x + 4 y = 3/4x - 0.3 Some non-linear functions are: f(x) = x2 y = sqrt(x) f(x) = x3 + x2 - 2

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