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grin007 [14]
3 years ago
5

What is the value of 9 - [42 - (3 + 2)].

Mathematics
1 answer:
Vlada [557]3 years ago
8 0

9 - [42 - (3 + 2)]

Parentheses first:

9-[42-5]

Brackets next:

9- 37

Now subtract to get -28

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3 years ago
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3 years ago
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2 years ago
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jeyben [28]

Answer:

81(x + 2y)(x - 2y)

Step-by-step explanation:

81 {x}^{2}  - 324 {y}^{2}  \\  \\  =  {(9x)}^{2}  -  {(18y)}^{2}  \\  \\  = (9x + 18y)(9x - 18y) \\  \\  = 9(x + 2y) \times 9(x - 2y) \\  \\  = 81(x + 2y)(x - 2y)

7 0
2 years ago
Read 2 more answers
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