Answer :

Simple....

you have:

1.)[tex] -9r^{2} -16[/tex]

2.)[tex] -45b^{2} -125[/tex]

3.)[tex] -x^{2}+7x-18 [/tex]

Factoring them out completely--->>>

1.)[tex]-9r^{2}-16 [/tex]

Factor out a -1

[tex]-( 9r^{2} +16)[/tex]

2.)[tex] -45b^{2} -125[/tex]

Factoring out  -5

[tex]-5( 9b^{2} +25)[/tex]

3.)[tex]- x^{2} +7x-18[/tex]

Factoring out a -1

[tex]-( x^{2} -7x+18)[/tex]

Thus, your answer.

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