If 3x + 2y = 12 and Xy = 6 ,find the value of 9x ^ 2 + 4y ^ 2 .

Asked by saakshigoel207 | 4th Jun, 2021, 08:19: PM

Expert Answer:

 3x + 2y = 12 
→ (3x + 2y) = 122
→  9x2 + 12xy + 4y2 = 144
→  9x2 + 12(6) + 4y2 = 144       .....xy = 6
→  9x2 + 72 + 4y2 = 144       
→  9x2 +  4y2 = 72      

Answered by Yasmeen Khan | 4th Jun, 2021, 10:18: PM