Question

PLEASE HELP! 50 POINTS!! 9x-20+x² =?​

Answer 1

`\huge \boxed{\sf 9}\\\\\\\sf x^2+9x-20\\\\An\ integer\ is\ a\ coefficient\ when\ multiplied\ by\ a\ variable.\\\\9\ is\ multiplied\ by\ x.`

Answer 2

Answer: (x+4.5)^2-40.25

Explanation:

x^2+9x-20=

x^2+9x+4.5^2-4.5^2-20=

x^2+9x+20.25-20.25-20=

(x+4.5)^2-20.25-20=(x+4.5)^2-40.25