(3x + 4)(x – 2)

how do I solve this?

I'm assuming you're solving for x?

Set each term in parentheses equal to 0, yielding:
~ 3x + 4 = 0
~ x - 2 = 0

Now isolate x and solve. For the first equation, this would be subtracting 4 from both sides, then dividing by three.

x = -4/3, 2