Class 14
MATHS
Algebra

# यदिम x=b+c-2a, y=c+a-2b,z=a+b-2c है तो x^(2)+y^(2)-z^(2)+2xy का मान क्या होगा?

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Updated On: 9-8-2020

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Very Important Questions

0a+b+ca-b+ca+b-c
x-b+c-2a <br> y=c+a-2b <br> z=a+b-2c <br> impliesx+y+z=(b+c-2a)+ <br> (c=a-2b)+(a+b-2c)=0 <br> :. Now <br> = x^(2)+y^(2)+2xy-z^(2) <br> =(x+y)^(2)-z^(2)(A^(2)-B)^(2)=(A+B)(A-B) <br> (x+y-z)(x+y+z)=0 <br> :. x^(2)+y^(2)-z^(2)+2xy=0 xx (x+y-z)=0
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