Math, asked by Chinum, 1 year ago

Factorise: r²/s² - 81/100

Answers

Answered by mafty

0

r²/s²-81/100=0
r²/s²=81/100
r/s=√81/100
r/s=9/10

Answered by QwertyZoom

1

= r²/s²-(9)²/(10)²
= (r/s)²-(9/10)²
= (r/s+9/10)(r/s-9/10)
Or
= (10r+9s)(10r-9s)/(100s²)

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