Question

Me pueden ayudar. Se los agradecería.

Answer 1

$1) \\3x-8y-2z;7x+3y+z\\ =3x-8y-2z+7x+3y+z=10x-5y-z\\\\2)\\ -5m-3n+6;2m+2n-8\\ =-5m+2m-3n+2n+6-8=-3m-n-2\\\\ 3)\\ (11a-b+c)+(-8a-c)\\ =11a-b+c-8a-c=3a-b\\\\ 4)\\ (3p-5q-6r)+(2p+3q-2r)+(-12p+4q+r)\\ 3p+2p-12p-5q+3q+4q-6r-2r+r=-7p+2q-7r$

$5)\\ 6x^{2}+3x-2; -x^{2} +7x+4\\ 6x^{2} -x^{2} +3x+7x-2+4=5x^{2} +10x+2\\\\ 6) \\ (8a^{2} -6a^{3}+4a)+( 4a^{3} +a^{2}-4a-5)\\ 8a^{2}+a^{2}-6a^{3}+4a^{3}+4a-4a-5=9a^{3}-2a^{3}-5\\\\ 7)\\(5x^{4} -3x^{2}+6x-3)+ (-3x^{4} +x^{3}+5x^{2}-7x+3)\\5x^{4} -3x^{4} +x^{3} -3x^{2}+5x^{2} +6x-7x-3+3=2x^{4}+x^{3}+2x^{2}-x$

$8)\\(5x^{2}-5x+6)+(2x^{2}-7x+4)+(-6x^{2}+10x-10)\\ 5x^{2} +2x^{2}-6x^{2}-5x-7x+10x+6+4-10=x^{2}-2x\\\\9)\\y^{3} -y;2y^{2}-5y+7;4y^{3}-5y^{2}+3y-8\\ y^{3} +4y^{3}+2y^{2}-5y^{2}-y-5y+3y+7-8=5y^{3}-3y^{2} -3y-1 \\\\ 10)\\ 8z^{3} -9;-4z^{3}+2z^{2}+6;5z^{2}-2z^{3}-7z+2\\ 8z^{3}-4z^{3}-2z^{3}+2z^{2} +5z^{2}-7z-9+6+2=2z^{3}+7z^{2}-7z-1\\\\\\\\\\ Saludos$