4x^2+1 factorise it please do it fast
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Step-by-step explanation:
4x² + 1 = 4x² - (√-1)²
= 4x² - i² ( i = √-1 imaginary unit)
= using the identity a² - b² = (a + b)(a - b)
4x² - i² = (2x - i)(2x + i)
Hence the answer is (2x - i)(2x + i)
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