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Simplify:789 x 789 x 789 +211 x 211 x 211--------------------------------------------------------789 x 789 - 789 x 211 + 211 x 211Please don't remove the cube root and solve.... Take them as '... solve according to formulae and explain... |
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Answer» 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 |
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