Answer:
B
Step-by-step explanation:
When you multiply 2 equations together, you just multiply them. You'd get x(3x-20) = 3x^2 - 20x, which is B
The product of an equation is answer to a multiplication problem. x times 3x is 3x squared. x times -20 is -20x. Thus, your answer is B. Mark Brainliest!
-243
số dương nhân -3 thì đc số âm, số âm nhân với -3 để đc số dương.
vd: 1. -3 = -3 ; -3 .-3= 9 ;..... 81 . -3= -243
x+4y-6z=-1
2x-y+2z=-7
-x+2y-4z=5
