aangellexith4237
26.11.2019 •
Mathematics
The sum of a whole number and its square is 90. find the number
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Ответ:
-10 or 9
Step-by-step explanation:
Lets set it up like an equation
x + x^2 = 90
x^2 + x -90 = 0
Use abc-formula
to find x = -10 or 9
We put this into the original equation and find that both answers fit the equation
Ответ:
C.) m∠C = 45°