Răspuns:
Explicație pas cu pas:
3x^3 + 6x^2 + 3x = 3x(x^2 + 2x + 1) = 3x(x + 1)^2
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4x(x + 1) - 3(x + 1) = (x + 1)(4x - 3)
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4x^2 - (x - 1)^2 = (2x + x - 1)(2x - x + 1) = (3x - 1)(x + 1)
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x^2 + 6x + 8 = x^2 + 2x + 4x + 8 = x(x + 2) + 4(x + 2) = (x + 2)(x + 4)
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x^3 + 3x^2 - 4x - 12 = x^2(x + 3) - 4(x + 3) = (x + 3)(x^2 - 4)
= (x + 3)(x - 2)(x + 2)
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x^3 + 2x^2 - 9x - 18 = x^2(x + 2) - 9(x + 2) = (x + 2)(x^2 - 9)
= (x + 2)(x - 3)(x + 3)
