**(i) 60x ^{2} – 70x – 30**

**(ii) x ^{2} – 6xy – 7y^{2}**

**Answer :**

**(i) 60x**^{2} – 70x – 30

^{2}– 70x – 30

Take out common in all terms we get,

10(6x^{2} – 7x – 3)

10(6x^{2} – 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) x**^{2} – 6xy – 7y^{2}

^{2}– 6xy – 7y

^{2}

x^{2} – 6xy – 7y^{2}

x^{2} – 7xy + xy – 7y^{2}

Take out common in all terms we get,

x(x – 7y) + y(x – 7y)

(x – 7y) (x + y)

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