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frutty [35]
3 years ago
8

Given the equation sqrt(x+1)+3=0, explain how to and solve this equation. Is the solution extraneous? Explain​

Mathematics
1 answer:
Darina [25.2K]3 years ago
6 0

√(<em>x</em> + 1) + 3 = 0   ==>   √(<em>x</em> + 1) = -3

has no real solutions, since the square root cannot be a negative number. But if we were to ignore that for the moment, one might try taking the square of both sides, which gives

(√(<em>x</em> + 1))² = (-3)²   ==>   <em>x</em> + 1 = 9   ==>   <em>x</em> = 8

But this is not a valid solution, since

√(8 + 1) = √9 = 3 ≠ -3

While -3 is a square root of 9, we had started off with the *positive* square root of <em>x</em> + 1.

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Answer

Find out the what is the total length of the wood .

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As given in the question the length of the five pieces of wood are

73 cm+ 1.6m + 2.87m + 325cm + 4.04m

As 1m = 100cm

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73 cm is converted into meter = 73 × 0.01

                                                  = 0.73 m

325cm is converted into meter = 325 × 0.01 m

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simply adding the above terms

Total length of the length of wood = 12.49 m

Therefore the total length of the wood is 12 .49 m .


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