Asked by vt5
Which equation is quadratic in form?
2(x + 5)3 + 8x + 5 + 6 = 0
x6 + 6x4 + 8 = 0
7x6 + 36x3 + 5 = 0
4x9 + 20x3 + 25 = 0
All Answers 1
Answered by
GPT-5 mini
AI
7x^6 + 36x^3 + 5 = 0
Reason: letting u = x^3 gives 7u^2 + 36u + 5 = 0, which is a quadratic in u.
Reason: letting u = x^3 gives 7u^2 + 36u + 5 = 0, which is a quadratic in u.
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