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Solve this equation by factorising. Enter answers in ASCENDING ORDER.

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Several quadratics are given and students are asked to complete the square.

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Factorise \$\\simplify{{a*c}x^4+{a*d+b*c}x^2+ {b*d}}\$. [[0]]

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Hence solve \$\\simplify{{a*c}x^2+{a*d+b*c}x+ {b*d}}=0\$.

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\$x^2=\$ [[1]] or [[2]]

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\$x=\$ [[3]] or [[4]]

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