00:01
We're being asked to solve the given equation.
00:02
Well, as you can see, it's a proportion, so i'm going to do this using cross -products.
00:07
So first, i need to multiply the extremes.
00:09
So we're going to have to multiply x times the quantity of x plus 3.
00:13
And this will be equal to the product of our means, which are 2 and 5.
00:17
Well, 2 times 5 is just 10.
00:20
So i'm going to next distribute the x, well, x times x is x squared, and x times 3 is positive 3x.
00:28
Now, as you can see, it's a quadratic.
00:30
So we have to set it equal to zero.
00:32
So i'm going to subtract 10 from both sides of our equation.
00:36
So we're going to have x squared plus 3x minus 10 is equal to zero.
00:41
So now i'm going to solve this by factoring...