Question

if 2a-3b=5 then find the value of 8acube -27bcube-125

Answer 1

2a-3b=5 this first equation

8acube-27bcube-125=(2a) cube - (3b) cube- 5 cube

2a cube - 3b cube = 5 cube becoz if cube at rhs even at lhs

So answer is 0=5cube -5cube

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