Q. 1 A

# Factorise.</p

On comparing with standard quadratic equation that is we have,

a = 1, b = 9 and c = 18

Now here,

Product a c = 1 18 = 18

Factors of 18; 2 9 and 6 3

Sum should be b = + 9

From above factors (+ 6x + 3x)

will give + 9x sum

therefore + 9x is replaced by ( + 6x + 3x)

Now above eq. becomes

x2 + 6x + 3x + 18 ; taking x common

(x + 3)(x + 6)

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