Math, asked by Sharmasharm, 1 year ago

If a+2b=3 and ab=-5 then find 1a cube +8b cube

Answers

Answered by yeddusurya497

1

Answer:

Step-by-step explanation:

a+2b=3 and ab=-5

a+2b=3

cube on both sides

a³+8b³+3·a ·2b (a+2b) = 27

a³+8b³+6(-5)(3) =27

a³+8b³=117

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