Question

trinômio 9x²y² - 30 xy + 25,
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Answer 1

Vamos lá!

${9x}^{2} {y}^{2} - 30xy + 25 = \\ \sqrt{9 {x}^{2}y {}^{2} } - 30xy + \sqrt{25 } = \\ \green{\boxed{ \boxed{ (3xy - 5) {}^{2} }}}$