Yoo can someone tell me how to solve this: (x+5)(x^2+4x−8)

and this: (2h+3)(2h^2+3h+4)

i dont understand how to solve them, so a good explanation would be appreciated

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?

Aright triangle has an area of 21 m2. the dimensions of the triangle are increased by a scale factor of 4. what is the area of the new triangle

Could someone me with this question i’ve been stuck on it for 20 minutes