How do you know the solution to the equation 5x - 2 = 3x + 4 is x=3?

Aresearch company wants to test the claim that a new multivitamin to improve short term memory. state the objective of the experiment, suggest a population, determine the experimental and control groups, and describe a sample procedure.

Which of the binomials below is a factor of this trinominal? x^2-13+30

Use set builder notation to represent the following set: { -3, -2, -1, 0}