Question

$36{x}^{2} - 72x + 81 =$
$9 {m}^{2} + 12mn + 4 {n}^{2} =$
${m}^{2} + 4mn + 4 {n}^{2} =$
$9 {x}^{2} - 30 {x}^{3} + 25xy =$
${x}^{2} - 7x - 6 =$
${m}^{4} - 7 {m}^{2} + 12 =$
${x}^{2} - 10x + 21 =$
${x}^{2} + 5x - 36 =$
${x}^{2} + x - 30 =$
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Answer 1

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