ANSWER:
Yes, the Bible supports the trinity.
Genesis 1:26 shows that ‘us created man’, and Genesis 1:27 shows that it’s God who created man. That’s why God is in three different persons.
Malachi 1:9 points out that ‘us’ is referring to different persons.
Some people can’t figure out how God can be three separate persons when He’s one and only one true God.
It’s the same thing.
It’s impossible to figure out how God can create nothing into something.
It’s impossible to figure out how God can feed five thousands with a few loaves of bread.
It’s impossible to figure out the things of God, like His eternity.
The point is, God cannot be God if man can figure things out.
God is God because of His great power, that no one can figure out.
Hence, the same thing with His trinity.
If man can figure out the trinity, then God cannot be God.