Factor the expression.

Question

r squared plus 19 r s plus 90 s squared

(1 point)
Responses

left parenthesis r plus 3 s right parenthesis times left parenthesis r plus 30 s right parenthesis
Image with alt text: left parenthesis r plus 3 s right parenthesis times left parenthesis r plus 30 s right parenthesis

left parenthesis r plus 3 right parenthesis times left parenthesis r plus 30 s squared right parenthesis
Image with alt text: left parenthesis r plus 3 right parenthesis times left parenthesis r plus 30 s squared right parenthesis

left parenthesis r plus 10 s right parenthesis times left parenthesis r plus 9 s right parenthesis
Image with alt text: left parenthesis r plus 10 s right parenthesis times left parenthesis r plus 9 s right parenthesis

left parenthesis r plus 10 right parenthesis times left parenthesis r plus 9 s squared right parenthesis

Answer 1

The correct factorization of the expression is:

(r + 10s)(r + 9s)