Come consideri il fattore 2x ^ 3 + 54 #?
Risposta:
2x^3 + 54 = 2(x +3)(x^2 -3x +9)2x3+54=2(x+3)(x2−3x+9)
Spiegazione:
First take out the common factor of 2
2(x^3 +27)2(x3+27)
Then recognize this as the sum of cubes. To factor cubes, memorize the expression a^3 + b^3 = (a + b)(a^2 – ab + b^2)
Poi 2x^3 + 54 = 2(x +3)(x^2 -3x +9)