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Factorise: x2– 81​
  • a)
    (x+9)(x+9)
  • b)
    (x-9)(x-9)
  • c)
    (x-9)(x+9)
  • d)
    (x-81)(x+1)
Correct answer is option 'C'. Can you explain this answer?
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Factorise: x2– 81​a)(x+9)(x+9)b)(x-9)(x-9)c)(x-9)(x+9)d)(x...
(x) ² - (9)² put the formula of a²-b²where a= x and b = 9 (x-9)(x+9)
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Factorise: x2– 81​a)(x+9)(x+9)b)(x-9)(x-9)c)(x-9)(x+9)d)(x-81)(x+1)Correct answer is option 'C'. Can you explain this answer?
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