if 3x - 4y = 10 and xy = -1, find the value of 9x2 + 16y2
Answers
Answered by
3
Answer:
9x²+16y²=76
Step-by-step explanation:
If 3x - 4y = 10 and xy = -1,
- then,(3x - 4y)² = 10²
- 9x²+16y²-24xy=100
- 9x²+16y²-24(-1)=100
- 9x²+16y²=100-24
- 9x²+16y²=76
Answered by
2
Answer:
76
Step-by-step explanation:
=(3x-4y)^2=10
=9x^2+16y2-24xy=100
=9x^2+16y^2+24=100
9x^2+16y^2=76
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