Factorise:-)
a^4 - 7a^2 + 1
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Answered by
0
Step-by-step explanation:
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Answered by
2
Answer:
(a²+√3a+1)(a²-√3a+1)
Step-by-step explanation:
a⁴-7a²+1
= a⁴-4a²+1-3a²
= (a²)²-4*a²*1+(1)²-3a²
= (a²+1)²-3a²
= (a²+1)²-(√3 a)²
= (a²+1+√3a)(a²+1-√3a)
= (a²+√3a+1)(a²-√3a+1)
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