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If its domain is all real numbers, which. Identify a quadratic equation. Unit 5: Quadratic Functions - HCBE MATH 10. These MCQs can help you to prepare for your exams, interviews and different tests. 3b Complete the square in a quadratic expression to reveal the maximum and minimum value of the function defined by the expression. All units follow the same basic format (See Elements of the Coursebook). By definition, i is a square root Of — I. Teacher Notes.