1.

Factorise : 3 - a (4 + 7а)​

Answer»

ANSWER:

(3-7A)(a+1)

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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