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If f(x)=−3x2−2x+1, find 2[f(r)]

Please use your BIG BRAIN SKILLS this is the last question on my test please help..... :{

User Khatchad
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1 Answer

4 votes

Answer:


-6x^2r-4xr+2r

Explanation:


f(x)=-3x^2-2x+1\\\\2[f(r)]

Plug in the value of f of x into the second expression:


2[(-3x^2-2x+1)(r)]

Use the distributive property to distribute the two:


2(-3x^2)+2(-2x)+2(1)[r]\\\\-6x^2-4x+2[r]

Distribute each value among r:


-6x^2r-4xr+2r

:Done

User Hokutosei
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