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Sagot :
Answer:
(3x + 2)(-x^3 - 3) =
3x(-x^3 - 3) + 2(-x^3 - 3) =
-3x^4 - 2x^3 - 9x - 6 <== result of multiplying (3x+2)(-x^3-3)
now multiply that by (3+x)...
(3+x)(-3x^4 - 2x^3 - 9x - 6) =
3(-3x^4 - 2x^3 - 9x - 6) + x(-3x^4 - 2x^3 - 9x - 6) =
-9x^4 -6x^3 - 27x - 18 - 3x^5 - 2x^4 - 9x^2 - 6x =
-3x^5 - 11x^4 - 6x^3 - 9x^2 - 33x - 18 <== result of multiplying by (3 + x)
the coefficient of x^4 = -11 <==
Step-by-step explanation:
Answer:
(3x + 2)(-x^3 - 3) =
3x(-x^3 - 3) + 2(-x^3 - 3) =
-3x^4 - 2x^3 - 9x - 6 <== result of multiplying (3x+2)(-x^3-3)
now multiply that by (3+x)...
(3+x)(-3x^4 - 2x^3 - 9x - 6) =
3(-3x^4 - 2x^3 - 9x - 6) + x(-3x^4 - 2x^3 - 9x - 6) =
-9x^4 -6x^3 - 27x - 18 - 3x^5 - 2x^4 - 9x^2 - 6x =
-3x^5 - 11x^4 - 6x^3 - 9x^2 - 33x - 18 <== result of multiplying by (3 + x)
the coefficient of x^4 = -11 <==
Step-by-step explanation:
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