• Brainly User
Hope this may help;
 a^{4}+b^{4}=(a^{2}+ b^{2}) ^{2}-2a^{2} b^{2}
 a^{4}+b^{4}=(a^{2}+ b^{2}+a*b*\sqrt[]{2})*(a^{2}+ b^{2}-a*b*\sqrt[]{2}
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possibly what you gave is the only one...good work.
i think the question is not right. expansion of (a+b)^4 = a^4+.... . a^4+b^4 is already in expanded form.
No sir, there are expansions for (a^3 + b^3), (a^3-b^3), (a^5-b^5) etc.
yeah the question is factorise a4+b4 i guess

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A⁴ + b⁴
= (a² + b²)² - 2a²b²
={(a + b)² - 2ab}² - 2a²b²
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