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USPshnik [31]
3 years ago
10

Solve this polynomial:

Mathematics
1 answer:
ivann1987 [24]3 years ago
4 0
2d^2 -2d-7

(14d^2 - 8) + (6d^2 - 2d + 1)
14d^2 - 8+ 6d^2 - 2d + 1
20d^2 - 7 - 2d
20d^2 - 2d - 7
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The sides of a triangle have lengths of x, x + 5, and 25. If the longest side is 25, which of the following values of x would ma
Amiraneli [1.4K]
In a right angle, the sum of the squares of the two shorter sides is equal to the square of the longest side.
Here, the longest side is 25, the shorter sides are x and x+5.

x^2+(x+5)^2=25^2 \\
x^2+x^2+10x+25=625 \\
2x^2+10x+25=625 \ \ \ |-625 \\
2x^2+10x-600=0 \ \ \ |\div 2 \\
x^2+5x-300=0 \\
x^2+20x-15x-300=0 \\
x(x+20)-15(x+20)=0 \\
(x-15)(x+20)=0 \\
x-15=0 \ \lor \ x+20=0 \\
x=15 \ \lor \ x=-20


The length of a side must be a positive number, so x=15.
The answer is C.
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3 years ago
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bezimeni [28]

Answer:

4

Step-by-step explanation:


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ICE Princess25 [194]
THat's lightning brodda 
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Plzz help e for brainliest if 2 people answer
Doss [256]

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Read 2 more answers
Number 3.
Sergio039 [100]

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see explanation

Step-by-step explanation:

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