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(x + y)2 = x2 + 2xy + y2

So x2 + y2 = (x + y)2 - 2xy = a2 - 2b

Then (x2 + y2)2 = x4 + 2x2y2 + y4

So x4 + y4 = (x2 + y2)2 - 2x2y2 = (a2 - 2b)2 - 2b2

= a4 - 4a2b + 4b2 - 2b2

= a4 - 4a2b + 2b2

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โˆ™ 2010-12-11 17:55:06
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Algebra

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A polynomial of degree zero is a constant term

The grouping method of factoring can still be used when only some of the terms share a common factor A True B False

The sum or difference of p and q is the of the x-term in the trinomial

A number a power of a variable or a product of the two is a monomial while a polynomial is the of monomials

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Q: How do you express x4 plus y4 if given x plus y equals a xy equals b?
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