factorise 3 - a ( 4 + 7a)
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3-4a-7a square
7a square -4a -3
7a square-(7-3)a-3
7asquare-7a+3a-3
7a(a-1)-3(a-1)
(7a-3)(a-1)
therefore a=1
7a square -4a -3
7a square-(7-3)a-3
7asquare-7a+3a-3
7a(a-1)-3(a-1)
(7a-3)(a-1)
therefore a=1
antarapandit:
ur answer is wrong
the correct answer is (3-7a) (1+a)
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