Factorise: x2 + 4x - 77
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Answer:
X^2 + 4X - 77
= X^2 + (11X - 7X) - 77
= X^2 + 11X - 7X - 77
= X (X + 11) - 7 (X - 11)
= (X + 11) (X - 7)
Answer :- ( X + 11) (X - 7)
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