Question

elimine os parenteses e reduza os termos :
a)(3x³+5x²+x-3)+(x³-3x²=2x+4)
b)(4x³-4x²+2x-1)-(2x³-3x²+x+2)
c)(-x²+2xy+y²+2)-3(x²-2xy+y²-2)
d)(-x²-2xy-y²-1)-(-x²-2yx+y+1)

Answer 1

$a)(3 x^{3} +5 x^{2} +x-3)+( x^{3}-3 x^{2} -2x+4 )\to\\\\ 4- x^{3} +2 x^{2} -x+1\\ \\\\\\b) (4 x^{3} -4 x^{2} +2x-1)-(2 x^{3} -3x^{2} +x-2)\to\\\\ 2 x^{3} -7 x^{2} +3x-3\\ \\\\\\ c)(- x^{2} +2xy+ y^{2} +2)-(- 3x^{2} -2xy+ y^{2} -2)\to\\\\ - 4x^{2} +2 y^{2}\\ \\\\\\d)(- x^{2} -2xy- y^{2} -1)-(- x^{2} -2xy+ y^{2} +1)\to\\ \\-2 x^{2} -4xy +3$