Factorise:
1 - 2ab - (a^2 + b^2) = ?
(a) (1 + a - b) (1 + a + b)
(b) (1 + a + b) (1 - a + b)
(c) (1 + a + b) (1 - a - b)
(d) (1 + a - b) (1 - a + b)
Answers
Answered by
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1-2ab-a² -b²
1-(a+b)²
1² - (a+b)²
(1-a-b)(1+a+b)
C is correct
1-(a+b)²
1² - (a+b)²
(1-a-b)(1+a+b)
C is correct
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