CBSE Class 9 Answered
If 3x + 2y = 12 and Xy = 6 ,find the value of 9x ^ 2 + 4y ^ 2 .
Asked by saakshigoel207 | 04 Jun, 2021, 20:19: PM
Expert Answer
3x + 2y = 12
→ (3x + 2y)2 = 122
→ 9x2 + 12xy + 4y2 = 144
→ 9x2 + 12(6) + 4y2 = 144 .....xy = 6
→ 9x2 + 72 + 4y2 = 144
→ 9x2 + 4y2 = 72
Answered by Yasmeen Khan | 04 Jun, 2021, 22:18: PM
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