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Sagot :

Trancescientidn

x = 1, -4

Step-by-step explanation:

[tex]f(x) = g(x) \Rightarrow -x^2 - 3x + 12 = 2x^2 + 6x[/tex]

Collecting all similar terms, we get

[tex]3x^2 + 9x - 12 =0[/tex] or [tex]x^2 + 3x - 4 = 0[/tex]

This can then be factored as

[tex](x - 1)(x + 4) = 0[/tex]

So [tex]f(x) = g(x)[/tex] when [tex]x = 1[/tex] or [tex]x = -4.[/tex]

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