What is this quadratic equation written in standard form? -x^2+4=(3x-1)^2

What does x = in this equation x+3+2x=x+5

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2