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FromTheMoon [43]
3 years ago
5

Suri solved the equation x squared = 49 and found that x=7. What error did Suri make?

Mathematics
1 answer:
Anastaziya [24]3 years ago
7 0

Answer:

x = \frac{+}{-} 7

Step-by-step explanation:

x^{2} = 49

\sqrt{49} can equal 7 or -7

7 x 7 = 49.  -7 x -7 = 49

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Answer:

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Step-by-step explanation:

Equation

                       \frac{x}{x - 2} + \frac{x - 1}{x + 1} = -1

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                      \frac{x(x + 1) + (x - 2)(x - 1)}{(x - 2)(x + 1)} = - 1

Expand

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Simplify

3)                  2x² -2x + 2 = -1(x² + x - 2x - 2)

4)                  2x² - 2x + 2 = -x² + x + 2

Equal to zero

5)                  2x² - 2x + 2 + x² - x - 2 = 0

6)                  3x² - 3x = 0

Factor

7)                  3x(x - 1) = 0

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9)                    x₁ = 0/3                x₂ = 1

10)                  x₁ = 0                    x₂ = 1

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