Question

Factorisation using these identities. ​

Answer 1

Answer:

hey that photo has the solution for a 2 and b 1 2

and this down noted formula is the solution for a 1

$(1)a {}^{2} + b {}^{2} + 2(ab + bc + ca) \\ {a}^{2} + b^{2} + 2ab + 2bc + 2ac \\ {(a + b)}^{2} + 2(bc + ac)$

as it shows I have applied the first identity

hope it helps

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