(i) 60x2 – 70x – 30
(ii) x2 – 6xy – 7y2
Answer :
(i) 60x2 – 70x – 30
Take out common in all terms we get,
10(6x2 – 7x – 3)
10(6x2 – 9x + 2x – 3)
Again, take out common in all terms we get,
10(3x(2x – 3) + 1(2x – 3))
10(2x – 3) (3x + 1)
(ii) x2 – 6xy – 7y2
x2 – 6xy – 7y2
x2 – 7xy + xy – 7y2
Take out common in all terms we get,
x(x – 7y) + y(x – 7y)
(x – 7y) (x + y)
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