HCF of given polynomials by factorising

1. A.
   $(x + 1)$
2. B.
   $(x + 1)^2$
3. C.
   $x^2 + 1$
4. D.
   $(x + 1)^3$

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1. A.
   $(x + 2)(x - 3)$
2. B.
   $(x - 2)(x + 3)$
3. C.
   $(x + 2)(x - 1)$
4. D.
   $(x - 3)(x - 2)$

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1. A.
   $(x^2 + y^2)$
2. B.
   $(x^2 - y^2)$
3. C.
   $(x^3 - y^3 - x^2y + xy^2)$
4. D.
   $(x^3 - y^3 + x^2y - xy^2)$

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1. A.
   $bx + c$
2. B.
   $cx + d$
3. C.
   $ax + d$
4. D.
   $ax + b$

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1. A.
   $x - 5y$
2. B.
   $x + 5y$
3. C.
   $x^2 + 5xy + 25y^2$
4. D.
   1

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1. A.
   $a^3 + 3a^2 + 2a + 1$
2. B.
   $a^3 + a^2 + a + 1$
3. C.
   $(a^2 + a + 1)^2$
4. D.
   $(a^2 - a + 1)^2$

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1. A.
   1
2. B.
   $x^4 - x^2 + 1$
3. C.
   $x^4 + x^2 + 1$
4. D.
   $x^4 - x^2 - 1$

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1. A.
   $x+y$
2. B.
   $x+y+1$
3. C.
   $x+y-1$
4. D.
   1

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1. A.
   $(x - y)$
2. B.
   $(x - 2y)$
3. C.
   $(x + 2y)$
4. D.
   $(x + 4y)$

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