Question

add x3 + 5x2 + 3x to 6x2 - 8x3 + 8.
please give me a right answer... ​

Answer 1

-7x3+11x2+3x+8 it's right answer

Answer 2

Answer:

$\sf \: \: \cancel{ {x}^{3} } + 5 \: \cancel{ {x}^{2} } \: + 3x \\ \sf \: - 8 \: \cancel{ {x}^{3} } \: + 6 \: \cancel{ {x}^{2} } \: \: + 8 \\ - - - - - - - - - - \\ \sf \: - 8 + 11 + 3x + 8$