Question

please answer it fast please please please please please please please please please please ​

Answer 1

Answer:

3a-4b-c+6-(2a-5b+2c-9)

3a-4b-c+6-2a+5b-2c+9

3a-2a-4b+5b-c-2c+6+9

a+b-3c+15

3(a-2b)²-5(a-2b)

3(a-2b)(a-2b)-5(a-2b)

(a-2b){3(a-2b)-5}

(a-2b)(3a-6b-5)