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Maksim231197 [3]
3 years ago
8

(x-1)(x-3)(x+5)(x+7)=297

Mathematics
2 answers:
Assoli18 [71]3 years ago
7 0

Answer:

x=4

Step-by-step explanation:

(4-1)(4-3)(4+5)(4+7)=297

mihalych1998 [28]3 years ago
5 0

First simplify the expression into polynomial form,

(x-1)(x-3)(x+5)(x+7)=297

x^4+8x^3-10x^2-104x+105=297

x^4+8x^3-10x^2-104x-192=0

Now factor into,

(x-4)(x+8)(x^2+4x+6)=0

Which means the solutions are,

x-4=0\implies\boxed{x_1=4}

x+8=0\implies\boxed{x_2=-8}

and then two complex solutions because determinant of the third factor D\lt0,

x^2+4x+6=0

x^2+4x+4=-2

(x+2)^2=-2\implies\boxed{x_3=i\sqrt{2}-2},\boxed{x_4=-i\sqrt{2}-2}

Hope this helps :)

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Ans: (c)

y = k/x^2

when y = 100, x = 1
100 = k/1^2
k = 100

when x = 2,
y = 100/2
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(u/rachelmarrons already gave you the answer but here’s a step-by-step explanation in case you needed it haha)
4 0
3 years ago
I need help with this problem please?
user100 [1]

Answer:

Step-by-step explanation:

If ΔABC ~ ΔPQR

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or

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3 0
3 years ago
Scott wants to cover his patio with concrete pavers. If the patio is shaped like a trapezoid whose bases are 11 feet and 13 feet
GenaCL600 [577]

<u><em>Answer:</em></u>

Scott will need 168 ft² of pavers to cover his patio

<u><em>Explanation:</em></u>

Scott wants to cover a trapezoid-shaped patio

<u>This means that:</u>

To get the number of square feet of pavers he'll need, we need to get the area of his patio

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Scott will need 168 ft² of pavers to cover his patio

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5 0
3 years ago
72 = –6(y + 37)<br> plz help
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Answer:

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2 years ago
Given certain information, what is the value of x4-y4?
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Well right off the bat, I can see a good reason why it should boggle.

If (x+y)=6 and (x-y)=2, then (x+y)(x-y) would be 12. It can't be 20.

The first 4 lines on the paper are inconsistent, so the question in the 5th line can't be calculated.

Another possible source of uncertainty (for us, anyway) is the remarkable similarity between the way you write ' Y ' and the way you write ' 4 ' . For example, look at the ' Y⁴ ' (I think ...) in the last line.

3 0
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