Ответ:
1) ax+3x+4a+12=а(х+4)+3(х+4)=(х+4)(а+3)
2) ab-8a-bx+8x =a(b-8)-х(b-8)=(b-8)(а-х)
3) x^2m - x^2n + y^2m - y2^n=x^2(m-n)+y^2(m-n)=(x^2+y^2)(m-n)
=)
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Ответ:
1) ax+3x+4a+12=а(х+4)+3(х+4)=(х+4)(а+3)
2) ab-8a-bx+8x =a(b-8)-х(b-8)=(b-8)(а-х)
3) x^2m - x^2n + y^2m - y2^n=x^2(m-n)+y^2(m-n)=(x^2+y^2)(m-n)
=)