Factories the following
2x – 32x5
In given expression
Take out the common factor,
[2 × x - 2 × 2 × 2 × 2 × 2 × x × x × x × x × x]
⇒ 2 × x[1 - 2 × 2 × 2 × 2 × x × x × x × x]
⇒ 2x [1-16x4] = 2x [1-(2x)4]
⇒ In the term 1-(2x)4
= 1-(4x2)2
Both terms are perfect square
⇒ (4x2 )2 = 4x2 × 4x2
⇒ 1 = 1 × 1
∴ 1-(4x2)2 Seems to be in identity a2-b2 = (a + b)(a-b)
Where a = 1 and b = 4x2;
1-16x4 = (1-4x2)(1 + 4x2)
→ 1-4x2 = 1-(2x)2
∴ 1-4x2 Seems to be in identity a2-b2 = (a + b)(a-b)
Where a = 1 and b = 2x;
1-4x2 = (1-2x)(1 + 2x)
∴ 1-16x2 = (1-2x)(1 + 2x) (1 + 4x2)
Hence the factors of 2x – 32x5 are 2x,(1-2x),(1 + 2x) and (1 + 4x2)
Couldn't generate an explanation.
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