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

2 answers:

6 0

A=81
Hope this helps :)

3 0

Hope this helps you.

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Flura [38]

Answer:

4, -3

Step-by-step explanation:

The quadratic formula is $\frac{-b+-\sqrt{b^2-4ac} }{2a}$ .

When using the formula for both the negative and positive value of the sqrt, you will get:

x = 4, -3

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2 years ago

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Mumz [18]

8×10^7 hope this helped

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3 years ago

kati45 [8]

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Georgia [21]

3x=y
X+Y=20
5=x and 15=y are the answer. You can use elimination or substitution or guess and check!

6 0

3 years ago