PLEASE HELP!! 50 POINTS!!
2 answers:
<span>f(x) = 9x^3 + 2x^2 - 5x + 4 --------> 9x^3 + 2x^2 - 5x + 4
g(x) = - (<span>5x^3 - 7x + 4</span>) --------> - <span>5x^3 + 7x - 4</span>
<span>4x^3 + 2x^2 + 2x ---------> 0
I hope this helps you out because I just spent a lot of time figuring it out myself ad typing it out.</span></span>
I hope it doesn't look too messy:
(x)=9x^3+2x^2-5x+4 and g(x)=5x^3-7x+4
<span>so, by DEFINITION : </span>
<span>(f-g)(x) = f(x) - g(x) </span>
<span>= (9x^3 + 2x^2 - 5x + 4) - (5x^3 -7x + 4) </span>
<span>= 9x^3 + 2x^2 - 5x + 4 - 5x^3 + 7x - 4 <--- sign rule </span>
<span>= 4x^3 + 2x^2 + 2x </span>
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