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Tamiku [17]
3 years ago
8

If (9x − 4)(9x + 4) = ax^2 − b, what is the value of a?

Mathematics
2 answers:
ASHA 777 [7]3 years ago
6 0
A=81
Hope this helps :)
deff fn [24]3 years ago
3 0
Hope this helps you.

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Katyanochek1 [597]

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Step-by-step explanation:

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The fourth term of an arithmetic
yulyashka [42]

Answer:

2

Step-by-step explanation:

<u>Given AP where:</u>

  • a₄ = 2a₂ - 1
  • a₆ = 7

<u>To find</u>

  • a₁ = ?

<u>Since</u>

  • a₄ = a₁ + 3d
  • a₂ = a₁ + d
  • a₆ = a₁ + 5d

<u>Initial equations will change as:</u>

  • a₁ + 3d = 2(a₁ + d) - 1  ⇒  a₁ + 3d = 2a₁ + 2d - 1 ⇒ a₁ = d + 1
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<u>Comparing the above:</u>

  • d + 1 = 7 - 5d
  • 6d = 6
  • d = 1

<u>Then:</u>

  • a₁ = d + 1 = 1 + 1 = 2
  • a₁ = 2

The first term is 2

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motikmotik

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Step-by-step explanation:

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