Question

factorise by using formulas.

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Answer 1

Step-by-step explanation:

=25m^2+(15+15)m+9

=25m^2+15m+15m+9

=5m(5m+3)+3(5m+3)

=(5m+3)(5m+3)

Answer 2

Answer:

by splitting the middle term.

Hope it will help you