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gizmo_the_mogwai [7]
3 years ago
9

Soren solves the quadratic equation x^2 + 8x – 9 = 0 using the quadratic formula. In which step did Soren make an error?

Mathematics
1 answer:
pochemuha3 years ago
8 0

Answer:

step 3 didn't divide by 2

Step-by-step explanation:

in step

\frac{ - 8 +  \sqrt{100} }{2}  =  \frac{ - 8 + 10}{2}  = 1 \\  \frac{ - 8 -  \sqrt{100} }{2}  =  \frac{ - 8 - 10}{2}  =  - 9

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3 years ago
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Bas_tet [7]
X+y=12
8x+10y=102

8x+8y=96
8x+10y=102 _
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y=3

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x=12- 3
x=9

or
8x+10y=102
8x+30=102
8x=102-30
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3 years ago
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Step-by-step explanation:

3 0
3 years ago
What's the value of 280?
Roman55 [17]

Answer:

28⁰ = 1

Step-by-step explanation:

If you raise a number to the power of zero, it becomes 1, regardless of the number.  The only exception is 0⁰, which is undefined.  Any other value to the power of zero equals one.

The easiest way to see it is like this:

Pick any value, we'll call it x

x⁴ = x⁵ / x

x³ = x⁴ / x

x² = x³ / x

x¹ = x² / x

x⁰ = x¹ / x

Because x¹ is equal to x, then x⁰ is just x/x, which is always equal to 1, unless x is equal to zero.

3 0
3 years ago
Read 2 more answers
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