Technical information
Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: Empareja cada operación con su resultado. {(-8·x^4-7·x^2+4·x) + (-7·x^4+2·x^3+7·x^2) =; (-7·x^4+2·x^3+7·x^2) - (-8·x^4-7·x^2+4·x) =; (-8·x^4-7·x^2+4·x) - (-7·x^4+2·x^3+7·x^2) =} -> {-x^4-2·x^3-14·x^2+4·x; -15·x^4+2·x^3+4·x; 2·x^4+4·x^3+28·x^2-8·x; 15·x^4-2·x^3-4·x; -2·x^4-4·x^3-28·x^2+8·x; x^4+2·x^3+14·x^2-4·x}
Right answer summary: (-8·x^4-7·x^2+4·x) + (-7·x^4+2·x^3+7·x^2) = -> -15·x^4+2·x^3+4·x; (-7·x^4+2·x^3+7·x^2) - (-8·x^4-7·x^2+4·x) = -> x^4+2·x^3+14·x^2-4·x; (-8·x^4-7·x^2+4·x) - (-7·x^4+2·x^3+7·x^2) = -> -x^4-2·x^3-14·x^2+4·x
Question state: todo