Question

what should be subtracted from 2 x square minus y square + 4 Z Square to get X square + Y square minus Z Square​

Answer 1

Answer:

Q. 2x²-y²+4z² to get x²+y²-z²

sol.

equation: 2x²-y²+4z²

=2(x²+2z²)-y²

2x²-y²+4z²=x²+y²-z²

=x²+2y²+5z²

checking:

(2x²-y²+4z²)-(x²+2y²+5z²)

=x²+y²-z²

HENCE, PROVED//