1.

9 into x + a whole square - 4 x square factorise​

Answer»

ANSWER:(x+3A)(5x+3a)

Step-by-step explanation:

9(x+a)^2-4x^2

=9{x^2+2ax+a^2}-4x^2

=9x^2+18ax+9a^2-4x^2

=5x^2+18ax+9a^2

=5x^2+15ax+3ax+9a^2

=5x(x+3a)+3a(x+3a)

=(x+3a) (5x+3a)



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