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mote1985 [20]
3 years ago
5

Find the value of this expression if x = -7. x2 - 1

Mathematics
2 answers:
Reika [66]3 years ago
7 0

Answer:

x² - 1

-7² - 1

49 - 1

48

Free_Kalibri [48]3 years ago
3 0
The answer is: -14 -1 equals -15
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8 0
3 years ago
X = 7 + 3y
pogonyaev
<h3>Given Equation:</h3>

x = 7 + 3y

or, x - 3y - 7 = 0 ........ (i)

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or, 5x + 6y - 14 = 0 .........(ii)

<h3>To Find:</h3>

The value of x and y.

<h3>Solution:</h3>

By dividing eq. ii by 2, we get

5/2x + 3y - 7 = 0 ........ (iii)

By adding eq. i and eq. iii, we get

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By putting eq.(iv) in eq. (i), we get

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