The given expression in polynomial form is [tex]a^2+9a + 20[/tex]
In order to subtract 9a^2-6a+5 from 10a^2+3a+25, this will be expressed as:
[tex]10a^2+3a+25 - (9a^2-6a+5)\\[/tex]
Expand and get the required expression
[tex]=10a^2+3a+25 - 9a^2+6a-5\\Collect \ the \ like \ terms\\=10a^2-9a^2+3a+6a+25-5\\=a^2+9a + 20[/tex]
Hence the given expression in polynomial form is [tex]a^2+9a + 20[/tex]
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