how ro expand ( 3x + 6y ) whole cube
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(3x+6y)²
=(3x)²+2×3x×6y+(6y)²
=9x²+36xy+36y²
Answered by
1
Answer:
Step-by-step explanation:
(3x +6y)^3= (3x)^3+ (6y)^3+3x^2y+3xy^2
=27x^3+ 216y^3+126x^2y+216xy^2
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