Math, asked by atharvavaish, 5 months ago

Simplify:

(i)(
7/9 a + 9/7 b)² - ab

(ii) (s²t+tq²)²
– (2stq)²

Answers

Answered by sayyedanam2005

0

Answer:

plz mark me as brainlist

Attachments:

Answered by fathimaarifeen788

0

Answer:

1. 49/81 a^2+81/49 b^2+2ab

2. t^2(s^2-q^2)^2

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