Answer:
387
Step-by-step explanation:
129x3=387
Answer: 15150
2(83 × 45) + 2(30 × 45) + 2(30 × 83)
2(3735) + 2(1350) + 2(2490)
7470 + 2700 + 4980
= 15150
please give me a brainliest answer
x^2+y^2-2xy+1+2xy-x^2=y^2+1
First one and last one