Expand the following cubes:(1 + 2x)3

Using Identity:(x + y)3 = x3 + y3 + 3x2y + 3y2x(1 + 2x)3 = (1)3 + (2x)3 + 3(1)2(2x) + 3(2x)2(1)= 1 + 8x3 + 6x + 12x2= 4x3 + 12x2 + 6x + 1

Q6 of 90 Page 33

Expand the following cubes:
(1 + 2x)³

Using Identity:

(x + y)³ = x³ + y³ + 3x²y + 3y²x

(1 + 2x)³ = (1)³ + (2x)³ + 3(1)²(2x) + 3(2x)²(1)

= 1 + 8x³ + 6x + 12x²

= 4x³ + 12x² + 6x + 1

Factorize :

Expand the following cubes:

(3a – 2b)³

Expand the following cubes:

Questions · 90

3. Polynomials

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