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Scilla [17]
3 years ago
9

How many times does the graph of 4x = 32 - x2 cross the x-axis? 0 1 2

Mathematics
2 answers:
garri49 [273]3 years ago
7 0

Answer:

How many times does the graph of 4x = 32 - x2 cross the x-axis?

2

What are the solutions to the equation?  

✔ 4, -8

Step-by-step explanation:

Yakvenalex [24]3 years ago
4 0

Answer:

2

Step-by-step explanation:

4x = 32 - x2 would be much clearer if written as 4x = 32 - x^2.  Please use

" ^ " to indicate exponentiation.

Rewrite 4x = 32 - x^2 in the standard form of a quadratic:  x^2 + 4x - 32

Then the coefficients are a = 1, b = 4 and c = -32.

Find the discriminant.  It is b^2-4ac.  

Here, b^2-4ac = 4^2 - 4(1)(-32), or 16 + 128, or 144.

Because the discriminant is positive, we know immediately that this quadratic has two real, unequal roots.

So, the answer to this question is "the graph of 4x = 32 - x^2 cross the x-axis in two places."

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