Question

please answer it right otherwise I will report you ​

Answer 1

Answer:

0

Step-by-step explanation:

A=7x^2+5xy-9y^2

B=5y^2+xy-4x^2

C=4y^2-3x^2-6xy

show that A+B+C=0

(7x2+5xy-9y2)+(5y2+xy-4x2)+(4y2-3x2-6xy)=0

(7x2-4x2-3x2)+(5y2+4y2-9y2)+(5xy+xy-6xy)=0

(0)+(0)+(0)=0

0=0

L•H•S=R•H•S

hence proved

Answer 2

Answer:

ok.............................