(g +5)x(2g +g) when something is together like this,2g,then u multiply 2 x g.
but i'm not sure what the paper says . because i dont know what the letters mean.but here u go
A.(g+5)(2g+3)=(g+5)(2g+3)=(g)(2g)+(g)(3)+(5)(2g)+(5)(3)=2g2+3g+10g+15=2g2+13g+15
do you understand?
B.(h+1)(2h−3)=(h+1)(2h+−3)=(h)(2h)+(h)(−3)+(1)(2h)+(1)(−3)=2h2−3h+2h−3=2h2−h−3
C.(r−4)(2r−7)=(r+−4)(2r+−7)=(r)(2r)+(r)(−7)+(−4)(2r)+(−4)(−7)=2r2−7r−8r+28=2r2−15r+28
I hope it helps