Step-by-step explanation:
(2x-y+3)(2x-y-3)=
4x²-2xy-6x-2xy+y²+3y+6x-3y-9=
4x²-4xy+y²-9=
(2x-y)²-9
Answer:
Step-by-step explanation:
21 is c
Answer:
216x⁶y⁹
Step-by-step explanation:
[(3x²y³)2]³
[6x²y³]³
[6]³.[x²]³.[y³]³
216.x⁶.y⁹
216x⁶y⁹
Answer:
Let the scores on the first two test be x
Let score for third test be 14 exceeds second( or first) = x + 14
Total = 233
x + x + (x + 14) = 233
3x + 14 = 233
3x = 219
x = 73
Score of the third test = x + 14 = 73 + 14 = 87
Therefore, the scores are 73, 73, 87
