When multiplying terms with the same sign, we will get a product. When multiplying terms with different signs, we will get a product

positive; negative

Step-by-step explanation:

If a student is multiplying two positive numbers, the answer will always be positive.

  EX: 3 x 4 = 12

The same applies for two negatives. If two negatives are multiplied it will make a positive answer. This is where the phrase "two negatives make a positive" come from.

 EX: -3 x -4 = 12

However, if one number is positive and one is negative, then the answer will always be negative.

  EX 1: -3 x 4 = -12

  EX 2: 3 x -4 = -12

answer: this is not a question

step-by-step explanation: this is a answer

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,