Solve the system of equations (if possible). (If there are infinitely many solutions, express x1, x2, and x3 in terms of the parameter t. If there is no solution, enter NO SOLUTION.) 2x1 + 4x2 − x3 = −8
x1 + 3x2 + 6x3 = −19
3x1 + 5x2 − 8x3 = 3

The answer is why would a teacher ask that

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.