Question

1. (9a³b + 6ab - 4) - (10a³b - 6a²b² - 6)

Explanation:

Step1: Eliminar paréntesis

$(9a^{3}b + 6ab - 4)-(10a^{3}b-6a^{3}b^{2}-6)=9a^{3}b + 6ab - 4 - 10a^{3}b + 6a^{3}b^{2}+6$

Step2: Combinar términos semejantes

$(9a^{3}b-10a^{3}b)+6ab + 6a^{3}b^{2}+(-4 + 6)=-a^{3}b+6ab + 6a^{3}b^{2}+2$

Answer:

$-a^{3}b+6ab + 6a^{3}b^{2}+2$