Question

Add polynomial 3x2 -7x+5;7x2+12x-9

Answer 1

3x2-7x+5

7x2+12x-9

=10x2+5x-4

Answer 2

$\Huge\tt\purple{{\rm{A}}nswe{\rm{R}}~~↓}$

$\bf{{\underline{To~add}}:}$

$\sf{3x^{2}-7x+5~~and~~7x^{2}+12x-9}$

$\rm\implies{(3x^{2}-7x+5)+(7x^{2}+12x-9)}$

$\bf{Collecting~the~like~terms~we~get:}$

$\rm{~~~~~~~~~~(3x^{2}+7x^{2})+(-7x+12x)+(5-9)}$

$\rm\implies{(10x^{2})+(5x)+(-4)}$

$\rm\implies{\purple{\underline{\boxed{\bf 10x^{2}+5x-4}}}}$