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zhuklara [117]
3 years ago
9

If f(x) = x3+ x2and g(x) = x4+ x2+ x, what is the value of f(x) –g(x) when x = 1?

Mathematics
1 answer:
Serggg [28]3 years ago
8 0

Answer:

<h2>B) -1</h2>

Step-by-step explanation:

f(x)=x^3+x^2\\\\g(x)=x^4+x^2+x

<h3>METHOD 1</h3>

f(x)-g(x)=(x^3+x^2)-(x^4+x^2+x)=x^3+x^2-x^4-x^2-x\\\\=-x^4+x^3-x\\\\x=1\\\\-1^4+1^3-1=-1+1-1=-1

<h3>METHOD 2</h3>

x=1\\\\f(1)=1^3+1^2=1+1=2\\\\g(1)=1^4+1^2+1=1+1+1=3\\\\f(1)-g(1)=2-3=-1

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