1.

Expand :(x + 4)3

Answer»

(x + 4)3

Comparing (x + 4)3 with (a + b)3, we have a = x and b = 4.

(a + b)3 = a3 + 3a2b + 3ab2 + b3

(x + 4)3 = x3 + 3x2(4) + 3(x)(4)2 + 43

= x3 + 12x2 + 48x + 64



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