Evaluate the expression when x-2- y-3- and z-1-5-xz

Step 1: On substituting the value of x and z in the given expression x·z, we get, =x·z .= 2· 1/50ex0ex=+2/5Product of two numbers with the same sign is positiv ...

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Standard XII

Mathematics

Solving Linear Differential Equations of First Order

Evaluate the ...

Question

Evaluate the expression when $x = - 2, y = 3, a n d z = \frac{- 1}{5} \cdot x z$

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Solution

Step 1: On substituting the value of x and z in the given expression $x \cdot z$ , we get, $= x \cdot z$ .
$= - 2 \cdot - \frac{1}{5} = + \frac{2}{5}$
Product of two numbers with the same sign is positive.
Hence, the required answer is $+ \frac{2}{5}$ .

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Evaluate the expression when x=-2,y=3,andz=-15·xz

Step 1: On substituting the value of x and z in the given expression x·z, we get, =x·z .=-2·-15=+25Product of two numbers with the same sign is positive.Hence, the required answer is +25.

Evaluate the expression when $x = - 2, y = 3, a n d z = \frac{- 1}{5} \cdot x z$

Step 1: On substituting the value of x and z in the given expression $x \cdot z$ , we get, $= x \cdot z$ .
$= - 2 \cdot - \frac{1}{5} = + \frac{2}{5}$
Product of two numbers with the same sign is positive.
Hence, the required answer is $+ \frac{2}{5}$ .