Question

the value of (9a-5b)^2+180ab=​

Answer 1

Answer:

81a^2 + 25b^2 + 100ab

Step-by-step explanation:

(9a-5b)^2+180ab

= (9a)^2 + (5b)^2 -2×8a×5b +180ab

= 81a^2 +25b^2 -80ab + 180ab

= 81a^2 + 25b^2 + 100ab

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