Respuesta :

Answer:

5x^4 - 12^3 - 3x^2 + 4x + 10

Step-by-step explanation:

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Answer:

5x⁴-12x³-3x²+4x+10

Step by step explanation:

(7x⁴-9x³-4x²+5x+6)-(2x⁴+3x³-x²+x-4)

remove unnecessary parentheses:

7x⁴-9x³-4x²+5x+6-(2x⁴+3x³-x²+x-4)

When there is a minus sign in front of an expression in parentheses, switch the sign of each term in the expression:

7x⁴-9x³-4x²+5x+6-2x-3x³+x²-x+4

collect like terms:

7x⁴-9x³-4x²+5x +6-2x⁴-3x³+x²-x+4

5x⁴-12x³-3x²+4x+10