Can someone help w/ math plz asap

Which expression is the factorization of x^2+10+21

4. (10.03 mc) the equation of line cd is y = −2x − 2. write an equation of a line parallel to line cd in slope-intercept form that contains point (4, 5). (4 points) y = −2x + 13 y = negative 1 over 2 x + 7 y = negative 1 over 2 x + 3 − 2x − 3

3c2 + 2d)(–5c2 + d) select all of the partial products for the multiplication problem above.