Find the value of A - B - C if -A -7 xy -5 yz -3 zx B -4 yz -9 zx -4 y C -3 xz -5 x -2 xy A- 5 x y-3 z x-5 x-4 yB- 5 x y-9 y z-3 z x-4 yC- 5 xy -9 yz -2 zx -5 x -4 yD- 5 xy -9 yz -3 zx -5 x -4 y

The correct option is D 5xy + 9yz + 3zx + 5x 4y Given: A=(7xy + 5yz 3zx) B= nbsp;(4yz + 9zx 4y) C= ( 3xz + 5x 2xy) To find the value of A+B+C nbsp ...

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Byju's Answer

Standard VIII

Mathematics

Addition and Subtraction of Algebraic Expressions

Find the valu...

Question

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

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

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

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

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$5 x y + 9 y z + 2 z x + 5 x - 4 y$

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

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Solution

The correct option is D
$5 x y + 9 y z + 3 z x + 5 x - 4 y$

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

To find the value of $A + B + C$ we write the expressions one below the other with the like terms appearing exactly below like terms as:

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

Thus, $A + B + C = 5 x y + 9 y z + 3 x z + 5 x - 4 y$ .

Suggest Corrections

Find the value of A+B+C if : A=(7xy+5yz−3zx) B=(4yz+9zx−4y) C=(−3xz+5x−2xy)

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

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