00:01
In this problem, we're being asked to solve the given equation for x.
00:03
So, first thing we need to do is remove our preemphasies.
00:06
So i'm going to begin by multiplying the two binomials on the left -hand side.
00:10
To do this, we're going to use the foil method.
00:12
Well, x times x is x squared.
00:15
X times negative 4 is negative 4x.
00:18
4 times x is positive 4x, and 4 times negative 4 is negative 16.
00:24
And to remove the premises on the right -hand side, we're going to do the same method.
00:27
X times 5x is 5x squared, x times 4 is positive 4x, negative 3 times 5x is negative 15x, and negative 3 times 4x is negative 12.
00:39
Perfect.
00:40
Well, on the left hand side, i see we have like terms inside our parentheses, but negative 4x plus 4x is 0.
00:48
So these terms cancel.
00:49
So now we can go ahead and distribute the 5.
00:52
Well, 5 times x squared is 5x squared, and 5 times negative 16 is negative 8...