(2x+1/4) whole cube ans?
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8x³ + 1/64 + 3x² + 3x/8
Step-by-step explanation:
(2× + 1/4)³
(a+b)³ = a³ + b³ + 3ab(a + b)
= (2x)³ + (1/4)³ + 3(2x)(1/4)(2x + 1/4)
= 8x³ + 1/64 + 3(2x/4)(2x + 1/4)
= 8x³ + 1/64 + 6x/4(2x + 1/4)
= 8x³ + 1/64 + 12x²/4 + 6x/16
= 8x³ + 1/64 + 3x² + 3x/8
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