Question

Simplify:
789 x 789 x 789 +211 x 211 x 211
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789 x 789 - 789 x 211 + 211 x 211

Please don't remove the cube root and solve.... Take them as '
$a \: and \: b$
...
solve according to formulae and explain...​

Answer 1

Step-by-step explanation:

a³+b³/a²- ab+ b² =

a³+b³= (a+b)(a²-ab+ b²)

sol 789³+211³/ 789² - 789×211- 211²

by the property state above ...

(789+211)( 789²-789×211-211²)/

(789²-789×211-211²)

it will cancel then we have only

789+211= 10000