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Frank thinks that 2x + 3x^2 is the same as 5x^3. Which statement shows that it is NOT the same?

A2x+3^2=5x^2
B2(6)x3(6)^2not equal to 5(6)^3
C2x +3x not equal to 5x
D2(4) +3(4)^2 not equal to 5 (4)^3

Verified Answer :

I believe the answer is D. If you work it out, 
2(4) + 3(4)^2 doesn't equal 5(4)^3 because 
8 + 3(16)----- 5 (64)
8 + 48------- 320
56 doesn't equal 320. 

A doesn't disprove anything, B changes the original equation from adding to multiplying, and C is incorrect, 2x + 3x does equal 5x.

D is the correct answer.

Answer:

I got this right, I hope it helps

Step-by-step explanation:

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