factorise: x⁴ + 4 + 3x²
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x⁴+4+3x²
x⁴+3x²+4
x⁴+4x²_1x²+4
x²(x²+4)_1(x²+4)
(x²_1)(x²+4)
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Step-by-step explanation:
x⁴+4+3x²
x⁴+3x²+4
x⁴+4x²_1x²+4
x²(x²+4)_1(x²+4)
(x²_1)(x²+4)
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