Question

factorise (3 - 4y - 7y ^2)^2 -(4y + 1) ^2
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Answer 1

Answer:

we know that

a^2 - b^2 =(a+b) (a-b)

(3-4y -7y^2 +4y+1) (3-4y-7y^2-4y-1)

(4-7y^2) (2- 8y-7y^2)