00:01
We're being asked to simplify the given expression.
00:02
Well, any time you're asked to simplify an expression, the first thing you need to do is remove the parentheses.
00:08
So, to remove the first set of parentheses, we need to distribute the seven.
00:11
Well, seven times x squared is seven x squared, seven times three x is positive 21x, and seven times one is positive seven.
00:21
To remove the second set of parentheses, we need to distribute the nine.
00:24
Well, nine times x squared is positive nine x squared, 9 times 3x is positive 27x, and 9 times 1 is positive 9.
00:35
Lastly, to get rid of the last set of parentheses, we distribute the negative 5.
00:39
Well, negative 5 times x squared is negative 5x squared, negative 5 times 3x is negative 15x, and negative 5 times 1 is negative 5...