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The coefficient of x in the expansion of (x + 3)³ is _____ |
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Answer» We use the FOLLOWING identity: 【 (X + y)³ = x³ + y³ + 3XY(x + y) 】 ⇢(x + 3)³ = x³ + 27 + 3(x)(3)( x + 3) ⇢(x + 3)³ = x³ + 27 + 9X(x + 3) ⇢(x + 3)³ = x³ + 27 + 9x² + 27x Therefore, the coefficient of x is 27. -»-»-»-»-»-»-»-»-»-» -»-»-»-»-»-»-»-»-»-» ✪ Be Brainly ✪ |
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