factorise x^4+9x^2y^2+81y^4
praneshvijay:
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Answer:
(x²+9y²)² - 9x²y²
Step-by-step explanation:
x^4+9x^2y^2+81y^4
= (x²)² + 9x²y² + (9y²)²
Which is in the form a² + ab + b²
On factorizing give s ( a+b)²-ab
Thus the answer is (x²+9y²)² - 9x²y²
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