Answer:
[tex]2(7a-10)(10a+3)[/tex]
Step-by-step explanation:
[tex]140a^{2} -158a-60[/tex]
[tex]2(70a^{2} -79a-30)[/tex]
[tex]2(70a^{2} +21a-100a-30)[/tex]
[tex]2(7a(10a+3)-10(10a+3))[/tex]
[tex]=2(7a-10)(10a+3)[/tex]
