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Gala2k [10]
3 years ago
4

Quadratic equations often do not have only a single solution. sometimes they may have two solutions or even no solutions. in thi

s task you will look at some simple quadratic equations and extend the basic idea to some simple higher-order polynomials. what are the solutions to the equation x2 = 9?
Mathematics
1 answer:
schepotkina [342]3 years ago
4 0
X^2 = 9

x^2 - 9 = 0

(x + 3)(x - 3) = 0

x + 3 =    or   x - 3 = 0

x = -3   or   x = 3
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The graph of an absolute value function opens up and has a vertex of (0, -3).
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Answer:

The domain: all real numbers;

The range:  y\ge -3.

Step-by-step explanation:

The graph of the function y=|x| opens up and has a vertex at (0,0). If the graph of an absolute value function opens up and has a vertex of (0, -3), then the function has an expression

y=|x|-3 (see attached diagram).

The domain of the parent function y=|x| is the set of all real numbers, then the domain of the function y=|x|-3 is the set of all real numbers too.

The range of the parent function y=|x| is y\ge 0, then the range of the function y=|x|-3 is y\ge -3.

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3 years ago
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Is 2.78778777... a irational number
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