Question

Find a³-b³ if a-b=6 and ab=20

Answer 1

Hi mate

Here is ur answer ⬇️⬇️⬇️⬇️

a^3 - b^3 = (a-b) ( a^2 + b^2 + ab)

= (6)(a^2 + b^2 + 20)

= (6)[( a-b)^2 +2ab + 20]

{ (a-b)^2 = a^2+ b^2 - 2ab}

= (6)[(6)^2 + 2(20) + 20]

=( 6) [36+40+20]

=(6)(96)

= 576

I hope this will help you....

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