Question

factorise:-

81—90xy+25x²y²
​

Answer 1

Step-by-step explanation:

(9-5xy)^2 is yur answer......

Answer 2

Answer:

$81 - 90xy + 25 {x}^{2} {y}^{2} \\ = {9}^{2} - 2 \times 5xy \times 9 + {(5xy)}^{2} \\ = {(5xy - 9)}^{2} \\ \\ hope \: it \: helps \: you....... \\ please \: mark \: my \: answer \: as \\ brainleist......$