Pergunta

Determine the resulting polynomial: f(x)=2x+7 g(x)=-2x^2-8x+7 Find: f(x)cdot g(x) Answer Attemptiout of 2 square
Solução

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PauloElite · Tutor por 8 anos
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To find the resulting polynomial f(x) \cdot g(x) , we need to multiply the two given polynomials f(x) and g(x) .
Given:
f(x) = 2x + 7
g(x) = -2x^2 - 8x + 7
We will use the distributive property to multiply these polynomials:
f(x) \cdot g(x) = (2x + 7) \cdot (-2x^2 - 8x + 7)
Now, distribute each term in f(x) to each term in g(x) :
= 2x \cdot (-2x^2) + 2x \cdot (-8x) + 2x \cdot 7 + 7 \cdot (-2x^2) + 7 \cdot (-8x) + 7 \cdot 7
Calculate each product:
= -4x^3 - 16x^2 + 14x - 14x^2 - 56x + 49
Combine like terms:
= -4x^3 - 30x^2 - 42x + 49
So, the resulting polynomial is:
f(x) \cdot g(x) = -4x^3 - 30x^2 - 42x + 49
Given:
f(x) = 2x + 7
g(x) = -2x^2 - 8x + 7
We will use the distributive property to multiply these polynomials:
f(x) \cdot g(x) = (2x + 7) \cdot (-2x^2 - 8x + 7)
Now, distribute each term in f(x) to each term in g(x) :
= 2x \cdot (-2x^2) + 2x \cdot (-8x) + 2x \cdot 7 + 7 \cdot (-2x^2) + 7 \cdot (-8x) + 7 \cdot 7
Calculate each product:
= -4x^3 - 16x^2 + 14x - 14x^2 - 56x + 49
Combine like terms:
= -4x^3 - 30x^2 - 42x + 49
So, the resulting polynomial is:
f(x) \cdot g(x) = -4x^3 - 30x^2 - 42x + 49
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