Answer:
[tex]-4x^2+5x-28[/tex]
Step-by-step explanation:
Distribute -7 by multiplying it by ([tex]x^2[/tex]) and (4)
[tex]3x^2+5x-(7)(x^2)(7)(4)[/tex]
[tex]3x^2+5x-(7x^2+28)[/tex]
Now combine like terms
[tex](3x^2-7x^2)+5x-28[/tex]
[tex]-4x^2+5x-28[/tex]
