Explicación paso a paso:
[tex]q = x(x + 3) - 3x(x + 1) = \\ = {x}^{2} + 3x - 3 {x}^{2} - 3x \\ = {x - 3 {x}^{} }^{2} \\ = - 2 {x}^{2} [/tex]
espero te sirva
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Explicación paso a paso:
[tex]q = x(x + 3) - 3x(x + 1) = \\ = {x}^{2} + 3x - 3 {x}^{2} - 3x \\ = {x - 3 {x}^{} }^{2} \\ = - 2 {x}^{2} [/tex]
espero te sirva