alleryStart learning →First recognise a binomial square, then factorise a²−2ab+b²−c².
A(a−b−c)(a+b+c)
B(a−b−c)(a−b+c)
C(a+b−c)(a+b+c)
D(a−b+c)²
Answer & Solution
Correct answer: B. (a−b−c)(a−b+c)
The first three terms are (a − b)², so subtracting c² gives the factors a − b − c and a − b + c.
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