When $7 x y + 5 y z - 3 z x$ , $4 y z + 9 z x - 4 y$ and $- 3 x z + 5 x - 2 x y$ are added, we get $5 x y + 9 y z + 3 z x + 5 x - 4 y$ .

True

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False

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Solution

The correct option is A
True

$7 x y + 5 y z - 3 z x$ + $4 y z + 9 z x - 4 y$ + $- 2 x y - 3 x z + 5 x$
= $(7 x y - 2 x y) + (5 y z + 4 y z) + (- 3 z x + 9 z x - 3 z x) + 5 x - 4 y$

= $5 x y + 9 y z + 3 z x + 5 x - 4 y$ .

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Similar questions

Find the value of $A + B + C$ if :

$A = (7 x y + 5 y z - 3 z x)$
$B = (4 y z + 9 z x - 4 y)$
$C = (- 3 x z + 5 x - 2 x y)$

Solve the following:
Add $7 x y + 5 y z - 3 z x, 4 y z + 9 z x - 4 y, - 3 x z + 5 x - 2 y$

When $4 y z + 9 z x - 4 y$ and $- 3 x z + 5 x - 2 x y$ are added, we get $4 y z + 6 x z - 2 x y - 4 y + 5 x$ .

5 x y + 9 y z + 3 z x + 5 x - 4 y

$4 x y - 5 y z - 7 z$

$- 5 x y + 2 y z + z x$

$- 2 x y - 3 y z + 3 z x$

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