Answer:
y = (x -3)(x +2)
Explanation:
For x-intercept (q, 0), one of the factors of the polynomial is (x -q).
For the given x-intercepts, the factors are ...
y = (x -3)(x -(-2))
y = (x -3)(x +2)
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Additional comment
"Opens upward" means the leading coefficient is positive. The product of factors shown above has a positive leading coefficient (1), so does not need any modification.
If the parabola opened downward, we would need to multiply by -1.
If the y-intercept or some other point were specified, then we might need to multiply the equation by some factor other than 1.