factorise=x^(2)−1−6y−9y^(2)
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(x+1)(x-1)-3y(2+3y) will be the answer
manojsahu0711pb3gda:
step of this answer
first you should factorise x^2-1 that will be (x+1)(x-1) and factories -6y-9y^2 by taking -3y as a common
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