$\left(10{x}^{5}-8{x}^{4}-7{x}^{3}-10\right)+\left(-4{x}^{4}+12{x}^{3}+7x+9\right)$
You can still ask an expert for help

• Questions are typically answered in as fast as 30 minutes

Solve your problem for the price of one coffee

• Math expert for every subject
• Pay only if we can solve it

Theodore Schwartz
Solution is given below
$\left(10{x}^{5}-8{x}^{4}-7{x}^{3}-10\right)+\left(-4{x}^{4}+12{x}^{3}+7x+9\right)$
$=10{x}^{5}-8{x}^{4}-7{x}^{3}-10-4{x}^{4}+12{x}^{3}+7x+9$
$=10{x}^{5}+{x}^{4}\left(-8-4\right)+{x}^{3}\left(-7+12\right)+7x+9-10$
$=10{x}^{5}-12{x}^{4}+5{x}^{3}+7x-1$