1.

) (xg-9)(xE-9) (®)__.‘%_ ifl.i‘—lflfi % ZXG -sz LG et

Answer»

25 - 9x^2

= (5)^2 - (3x)^2Using identitya^2 - b^2 = (a + b)(a - b)

= (5 + 3x)(5 - 3x)



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