factorise the following using identities (i) x² – 12x + 36 (ii) 36p^2 -- 60pq + 25q^2 (iii) 9x^2 + 66xy + 121y^2
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Step-by-step explanation:
1) x^2-12x+36
=x^2-6x-6x+36
=x(x-6)-6(x-6)
=(x-6)(x-6)
x=6 or x=6
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