Question

factorise the following expression 2rspuare minus9r minus 45​

Answer 1

Answer:

2r²-(-9r)-45

= 2r²+9r-45

= 2x²+15x - 6x -45

= x(2x+15) - 3(2x+15)

= (x-3) (2x+15)

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Answer 2

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