Question

a³+2a-2a²-4
I want the answer step by step please​

Answer 1

Step-by-step explanation:

$\huge{\purple{❥}\pink{a}\orange{n}\blue{s}\red{w}\green{e}\purple{r}}$

question :-factorise

${a}^{3} + 2 a+ 2 {a}^{2} - 4$

solution:-

${a}^{3} + 2a - 2a - 4 \\ = a( {a}^{2} + 2) \: \: \times - 2( {a}^{2} + 2) \\ = ( {a}^{2} + 2) \times (a - 2)$

hope this helps

Answer 2

Answer:

Therefore the area covered by the roller in 1000 revolutions = 31680 × 1000 = 31680000 cm2

Therefore the area of the play ground = 31680000 cm2 = 3168 m2

→ l × b = 3168

→ l × 32 = 3168

→ l = 99 m