. Prove that the value of x² + y² + z²+ xy + yz + zx is 43 when x = 4, y = -6 and z = 5.
Answers
Answered by
11
Answer:
see this answer I think it will help you
Step-by-step explanation:
L. H. S. : R. H. S. : 43
x² + y² + z² + xy + yz + zx
= (4)² + (-6)² + (5)² + (4 × -6) + (-6 × 5) + (5 × 4)
= 16 + 36 + 25 -24 - 30 + 20
= 97 - 54
= 43 = R. H. S.
SO, L. H. S. = R. H. S. (PROVED)
Similar questions