Mathematics
Factorization of p2 − 2p − (q + 1)(q − 1) is:
(p + q − 1)(p − q + 1)
(p − q + 1)(p − q − 1)
(p + q − 1)(p − q − 1)
(p + q + 1)(p − q)
Factorisation
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Answer
Given,
⇒ p2 − 2p − (q + 1)(q − 1)
⇒ p2 − 2p − (q2 - 1)
⇒ p2 − 2p − q2 + 1
⇒ p2 − 2p + 1 − q2
⇒ (p - 1)2 − q2
⇒ (p - 1 + q)(p - 1 - q)
⇒ (p + q − 1)(p − q - 1).
Hence, option 3 is correct option.
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Assertion(A): One of the factors of (5x + 1)2 + (25x2 - 1) is 2x.
Reason(R): (a + b)2 = (a + b)(a + b) and a2 - b2 = (a + b)(a - b)
A is true, R is false
A is false, R is true
Both A and R are true
Both A and R are false
Assertion(A): can be factorized as
Reason(R): x3 - y3 = (x - y)(x2 + xy + y2).
A is true, R is false
A is false, R is true
Both A and R are true
Both A and R are false