Is 3x + 12 +x and 4 (3 + x) equivalent .Why and Whynot?

They are

Step-by-step explanation: the first one you add both terms of x’s and you get 12+4x. The second one you use the distributive property, 4*3+4*x and get 12+4x.

no because yes 4 multiplied by 3 its x but the 4 can still not replace the x

when studying polynomials, you often hear the terms zeros, roots, factors and x x the multiplicity of a zero is important because it tells us how the graph of the let's look at the graph of a function that has the same zeros

step-by-step explanation:

goog may have it for you