Lucia finds that (3x²+3x+5) + (7x²-9x+8) = 10x²-12x+13. What error did Lucia make?

A) She found the difference instead of the sum.

B) She combined the terms 3x² and 7x² incorrectly.

C) She combined the terms 3x and - 9x incorrectly.

D) She did not combine all like terms.

Question

Valerie Wolf

29 January, 10:30

+3

Answers (1)

Know the Answer?

Skyler Archer · Answer 1

Lucia combined like terms in correctly

your answer is c,

she should have gotten - 6x

because - 9+3=6

her answer should be 10^2 - 6x+13

Lucia finds that (3x²+3x+5) + (7x²-9x+8) = 10x²-12x+13. What error did Lucia make?A) She found the difference instead of the sum.B) She combined the terms 3x² and 7x² incorrectly.C) She combined the terms 3x and - 9x incorrectly.D) She did not combine all like terms.