**(i) 150 – 6a**^{2}

^{2}

**(ii) 32x**^{2} – 18y^{2}

^{2}– 18y

^{2}

**Answer :**

**(i) 150 – 6a**^{2}

^{2}

Take out common in all terms,

6(25 – a^{2})

6(5^{2} – a^{2})

We know that, a^{2} – b^{2} = (a + b) (a – b)

So, 6(5 + a) (5 – a)

**(ii) 32x**^{2} – 18y^{2}

^{2}– 18y

^{2}

32x^{2} – 18y^{2}

Take out common in all terms,

2(16x^{2} – 9y^{2})

2((4x)^{2} – (3y)^{2})

We know that, a^{2} – b^{2} = (a + b) (a – b)

2(4x + 3y) (4x – 3y)

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