Q. Given the function f(x)=−35x+25x3, then what is f(2x) as a simplified polynomial?Answer:
Substitute x in f(x): Substitute 2x for x in the function f(x). We have the function f(x)=−(35)x+(25)x3. To find f(2x), we replace every instance of x with 2x. f(2x)=−(35)(2x)+(25)(2x)3
Simplify by distributing and combining: Simplify the expression by distributing and combining like terms.First, we distribute the constants to the terms with x.f(2x)=−(35)×2x+(25)×(2x)3Now, we simplify each term.f(2x)=−(310)x+(25)×8x3f(2x)=−(310)x+40x3
Write final simplified polynomial: Write the final simplified polynomial.The expression is already simplified, so we can write the final answer.f(2x)=−(310)x+40x3
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