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Use the pattern for (a+b)^5 to write the fourth term of (w-4z)^5

Use the pattern for (a+b)^5 to write the fourth term of (w-4z)^5
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Use the pattern for (a+b)^5 to write the fourth term of (w-4z)^5

User Donald Powell
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The fourth term of (a+b)^5 is 10a^2b^3.

For a=w, b=-4z, this is
.. 10*(w)^2*(-4z)^3
.. = -640w^2*z^3
User ATJ
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