expand 2 X + 3 whole cube
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Answered by
84
Here the question is in the form of (a+b) ³. Instead of a we have "2x" and instead of b we have "3" . Now we need to apply the formula a³ + 3a² b + 3ab² + b ³ and we need to apply those values instead of a and b
(2x + 3)³ = (2 x)³ + 3 (2 x)²(3)+ 3 (2x) (3)² + (3)³
= 2³x³ + 3 (4x²)(3) + 3(2x)(9) + 27
= 8 x³ + 36 x ² + 54 x + 27
(2x + 3)³ = (2 x)³ + 3 (2 x)²(3)+ 3 (2x) (3)² + (3)³
= 2³x³ + 3 (4x²)(3) + 3(2x)(9) + 27
= 8 x³ + 36 x ² + 54 x + 27
Answered by
14
Answer:
Step-by-step explanation:(2x+3y) ^3+(4x-y) ^3
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