How can you tell when a quadratic equation has two identical, rational solutions? . a: when the radicand is negative. b: when the radicand is not a perfect square. c: when b in the quadratic formula is greater than the radicand. d: when the radicand equals zero

Which of the following statements is true? a. the irrational number system is not closed under multiplication, because the product of two irrational numbers is always a rational number. b. the irrational number system is not closed under multiplication, because the product of two irrational numbers is not always an irrational number. c. the irrational number system is closed under multiplication, because the product of two irrational numbers is always an irrational number. d. the irrational number system is closed under multiplication, because the product of two irrational numbers is always a rational numbers. reset submit