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Factorise : 3 - a (4 + 7а) |
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Answer» Step-by-step explanation: 3-a(4+7a) =3-4a-7a^2 =-7a^2-4a+3 =-{7a^2+4a-3} =-{7a^2+(7-3)a-3} =-{7a^2+7a-3a-3} =-{7a(a+1)-3(a+1)} =-(7a-3)(a+1) =(3-7a)(a+1) |
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