(9a)² + 2(90) + (9) + 9²
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Answered by
2
Answer:
(9a)² + 2(90) + 9 + 9²
81a² + 180 + 9 + 81
81a² + 189 + 81
81a² + 270
Answered by
1
Answer:
9 a² + 180 + 9 + 9²
9a² + 189 + 9²
9a² + 189 + 81
9a² + 270
a² = 270 /9
therfore 30a²
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