Square root of 49x⁴ + 42x³ + 79x² + 30x + 25 is?
- 7x² + 3x + 4
- 7x² + 6x + 5
- 7x² + 3x + 5
- None of these
Explanation
Verifying the Options
Given: sqrt{49x^4 + 42x^3 + 79x^2 + 30x + 25}
Checking the Options
We've already verified that (7x^2 + 3x + 5)^2 = 49x^4 + 42x^3 + 79x^2 + 30x + 25
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