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dcox5057
01.12.2020 •
Mathematics
Which equation has no solution? A. 24x + 32 − 2.1x = 20.9x + 30 + x + 2 B. 24x + 32 − 2.1x = 20.9x + 30 + x − 2 C. 24x + 32 − 2x = 20.9x + 30 + x − 2 D. 24x + 32 = 20.9x + 30
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Ответ:
x = - 9 ± √89
Step-by-step explanation:
Quadratic formula:
Ignore the A after the -b, wouldn't let me type it correctly.
x² + 18x - 8 = 0
With the formula.
a = 1
b = 18
c = - 8
Ignore the A again and for the rest of the explanation.
Now we will factorize the √356.
Separate into two equations.
One with addition and the other with subtraction.
Solve:
± is a mathematical symbol which represents addition and/or subtraction.
x = - 9 ± √89