factorise 9x^4+24x^2y^2+16y^4
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Answer:
9x⁴+24x²y²+16y⁴
=9x⁴+12x²y²+12x²y²+16y⁴
=3x²(3x²+4y²)+4y²(3x²+4y²)
=(3x²+4y²)(3x²+4y²)
=(3x²+4y²)²
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