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lbvjy [14]
3 years ago
8

Which are solutions of the equation x2 - 16 = 0? Check all that apply.

Mathematics
2 answers:
Karo-lina-s [1.5K]3 years ago
8 0
So we want to know what x times 2 is. So think about this: multiply x with 2. We can find out what works and what doesn’t. So remind yourself that if you are multiplying a negative number, you get a negative. And when you minus a negative with a positive it’s the same as a negative + a negative. So it can’t be a negative as the answer is 0. Try each positive and you will find the answer to be

X=8
Snezhnost [94]3 years ago
6 0

Answer:

B and E

Step-by-step explanation:

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3 0
3 years ago
Hello, how can I do this equation?
kompoz [17]
(9^x) - 3 = 2*3^x
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z^2 - 2*z - 3 = 0  ............ let z = 3^x
(z - 3)(z + 1) = 0

If z-3 = 0, then z = 3 when we isolate z
If z = 3, and z = 3^x, then
z = 3
3^x = 3
3^x = 3^1
x = 1
which is a solutin in terms of x

If z+1 = 0 then z = -1
If z = -1 and z = 3^x, then there are NO solutions for this part of the equation
The quantity 3^x is never negative no matter what the x value is

---------------------------------------------------------------

Answer: x = 1
4 0
3 years ago
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