A negative number divided by a negative number always yields a positive number. For instance, -4 / -2 = 2. In other words, there are two -2s in -4.
Continue ReadingLikewise, two negative numbers multiplied together always yield a positive number. For example, -2 x -2 = 4. Two positive numbers multiplied together are also positive, as is a positive number divided by a positive number.
A positive number multiplied by a negative number is always negative. For instance, -2 x 2 = -4. Negative numbers divided by positive numbers and positive numbers divided by negative numbers are always negative. For example, -4 / 2 = -2, and 4 / -2 = -2.
Learn more about AlgebraA two-step equation is an algebraic problem that takes two steps to solve for a missing number, which is often indicated as "n" (for number), "x" or "y."
Full Answer >The prime factors of 56 are 2 x 2 x 2 x 7. Prime factors of an original number are prime numbers that — when multiplied together — give back the original number. Finding the prime factors of a number is called prime factorization.
Full Answer >In algebra, the method of substitution is used to simplify problems by reducing the number of variables or quantities. The specific details of the solution depend on the original problem.
Full Answer >German mathematician Emily Noether's contributions include a number of published works on abstract algebra, with special attention to fields, groups and rings. Noether also proved two theorems basic to elementary particle and general relativity physics, one of which is named after her.
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