Question 694337

{{{18a^2 + 4 - (6 (a^2 - 2) + 5)}}}...first multiply {{{6 (a^2 - 2) }}}


 ={{{18a^2 + 4 - (6a^2 - 12 + 5)}}}..add {{{- 12 + 5)}}}


 ={{{18a^2 + 4 -(6a^2 -7)}}}..eliminate parentheses {{{-(6a^2 -7)}}}, be careful with a minus sign in front of parentheses


 ={{{18a^2 + 4 -6a^2 +7}}}


 ={{{18a^2 -6a^2 + 4 +7}}}


 ={{{12a^2 + 11}}}