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Amanda [17]
2 years ago
15

Factor the polynomial

Mathematics
1 answer:
arlik [135]2 years ago
4 0

Answer:

(5x+12) (5x-12)

Step-by-step explanation:

Use the difference of squares fromula. a^{2} -b^{2} =(a+b)(a-b)

Where a = 5x and b =12.

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Solve the system by substitution. Check your solution.
Zepler [3.9K]

Answer:

a.  (15, 15)

Step-by-step explanation:

We start with those two equations:

1) a - 1.2b = -3

2) 0.2b + 0.6a = 12

We'll begin by modifying equation #1 to isolate a:

a = -3 + 1.2b

Then we'll use this value for a in the second equation:

0.2b + 0.6 (-3 + 1.2b) = 12

0.2b - 1.8 + 0.72b = 12

0.92b = 13.8

b = 15

Then we'll place that value of b in the first equation to find a:

a - 1.2 (15) = -3

a - 18 = -3

a = 15

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I believe it should be C
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