1.

Factorise x square + 6x + 9

Answer»

x²+6x+9

This can be factorised by SPLITTING THE MIDDLE TERM.

x²+6x+9.
=x²+3x+3x+9.
=x(x+3)+3(x+3).
=(x+3)(x+3).
=(x+3)²

The factors of x²+6x+9 are (x+3) and (x+3).

It can ALSO be factorised by USING the IDENTITY (a+b)²=a²+2ab+b²



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