Question

factorise a(a+c) -b(b+c)
$(a + b) {}^{2} {}^{ | } = (a + b)(a - b)$
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Answer 1

Step-by-step explanation:

a(a+c) -b(b+c)

=a×a+a×c-b×b-b×c

=a²+ac-b²-bc

=(a²+b²)+ac-bc

=a+b+a-b+ac-bc

=2a+ac-bc

Answer 2

Answer:

a(a+c) -b(b+c)

=a×a+a×c-b×b-b×c

=a²+ac-b²-bc

=(a²+b²)+ac-bc

=a+b+a-b+ac-bc

=2a+ac-bc