Question

find the combined equation of lines x+y-2=0 and 2x-y+2=0​

Answer 1

Answer:

when we combine,

x+y-2+2x-y+2=0

+y and -y , +2 and -2 will be cancelled

3x=0 will be answer

Answer 2

Answer:

2x^2+xy-y^2-2x+4y-4=0

Step-by-step explanation:

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the combined equation of lines u=0&v=0 is uv=0

∴combined equations of x+y-2=0 & 2x-y+2=0 is (x+y-2)(2x-y+2)=0

∴x(2x-y+2)+y(2x-y+2)-2(2x-y+2)=0

∴2x^2-xy+2x+2xy-y^2+2y-4x+2y-4=0

∴2x^2+xy-y^2-2x+4y-4=0