{ 21. If }2a^2+9b^2+4c^2-4a-6b+4ac=-5 , then the }}{ value of }a^2-b^2 – InterviewSolution

1.	{ 21. If }2a^2+9b^2+4c^2-4a-6b+4ac=-5 , then the }}{ value of }a^2-b^2+c^2 is equal to
Answer» { 21. If }2a^2+9b^2+4c^2-4a-6b+4ac=-5 , then the }}{ value of }a^2-b^2+c^2 is equal to

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