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7. Factorisation
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Q4 of 137 Page 101

Factorize:

9 + 6z + z2

Given,


9 + 6z + z2 = z2 + 6z + 9


By using the formula (a + b)2 = a2 + 2ab + b2


We get,


= z2 + 2 × z × 3 + (3)2


= (3 + z)2


More from this chapter

All 137 →
2

Factorize:

x2 + 14x + 49

3

Factorize:

1 + 2x + x2

5

Factorize:

x2 + 6ax + 9a2

6

Factorize:

4y2 + 20y + 25

Questions · 137
7. Factorisation
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