Factorise:10x^2-18x^3+14x^4
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2×5×x×x-2x3×3×x×x×x×x+2×7×x+x+x+x+x+x
2x×x[5-3×3×x+7×x×x]
2x2(5-9x+7x2)
2x×x[5-3×3×x+7×x×x]
2x2(5-9x+7x2)
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