Question

$(2a +5b^2)^2 -3(3a -b)^3$ Respondam com quadrado da soma e cubo da diferença

Answer 1

(2a+5b²)²-3.(3a-b)³

4a²+10ab²+25b⁴ - 3.(27a³-3.9a²b+3.3ab²-b³)

4a²+10ab²+25b⁴ - 3.(27a³-27a²b+9ab²-b³)

4a²+10ab²+25b⁴ - 81a³+81a²b-27ab²+3b³

4a²+10ab²-27ab²+25b⁴-81a³+81a²b+3b³

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4a²-17ab²+25b⁴- 81.(a³-a²b)+3b³