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+6-2x⁴-3x³+x²-x+4
collect like terms:
7x⁴-9x³-4x²+5x +6-2x⁴-3x³+x²-x+4
5x⁴-12x³-3x²+4x+10
