Question

Factor each completely 1.-9r^2-16 2.-45b^2-125 3.-x^2+7x-18

Answer 1

Simple....

you have:

1.)$-9r^{2} -16$

2.)$-45b^{2} -125$

3.)$-x^{2}+7x-18$

Factoring them out completely--->>>

1.)$-9r^{2}-16$

Factor out a -1

$-( 9r^{2} +16)$

2.)$-45b^{2} -125$

Factoring out  -5

$-5( 9b^{2} +25)$

3.)$- x^{2} +7x-18$

Factoring out a -1

$-( x^{2} -7x+18)$

Thus, your answer.