Question

谁可以帮助我一下因式分解的问题！帮我解答加讲解谢谢！题目在下面!

-36d5f5-96d4f6-64d3f7
2x9-50
3r9-27r
3m5-60m3+192m
18r6-170r4+72r2
非常感谢！！

Answer 1

-36d5f5-96d4f6-64d3f7
=-4d3f5(9d²+24df+16f²)
=-4d3f5(3d+4f)²

2x9-50
=2*(9-25)
=2*(3+5)(3-5)

3r9-27r
=3r(r^8-9)
=3(r4+3)(r4-3)

3m5-60m3+192m
=3m(m4-20m²+64)
=3m(m²-16)(m²-4)
=3m(m-4)(m+4)(m-2)(m+2)

18r6-170r4+72r2
=2r²(9r4-85r²+36)
=2r²(r²-9)(9r²-4）
=2r²(r+3)(r-3)(r+2)(r-2)