SOLUTION: 18a^2 + 4 - [6 (a^2 - 2) + 5] =

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Question 694337: 18a^2 + 4 - [6 (a^2 - 2) + 5] =
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

18a%5E2+%2B+4+-+%286+%28a%5E2+-+2%29+%2B+5%29...first multiply 6+%28a%5E2+-+2%29+

=18a%5E2+%2B+4+-+%286a%5E2+-+12+%2B+5%29..add -+12+%2B+5%29

=18a%5E2+%2B+4+-%286a%5E2+-7%29..eliminate parentheses -%286a%5E2+-7%29, be careful with a minus sign in front of parentheses

=18a%5E2+%2B+4+-6a%5E2+%2B7

=18a%5E2+-6a%5E2+%2B+4+%2B7

=12a%5E2+%2B+11