alleryThe difference of squares a^2 - b^2 factorises as
A(a + b)^2
B(a - b)^2
C(a + b)(a - b)
Da(a - b)
Answer & Solution
Correct answer: C. (a + b)(a - b)
Multiplying (a + b)(a - b) cancels the cross terms and leaves a^2 - b^2.
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