A= (x+2)(3-x)+7x(-x+4)=B=(x-4)(2x+1) -(5x-2)xC=(1-2x) (-x+8) -3x (x-6).... Pergunta de ideia desabrinamdr59

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A= (x+2)(3-x)+7x(-x+4)=

B=(x-4)(2x+1) -(5x-2)x

C=(1-2x) (-x+8) -3x (x-6)