Question

Q4. Verify that -(-a)=a is true for a =
-19/21​

Answer 1

its true in the case ......

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Answer 2

Answer:

-(-a) = a  is true for a = $\frac{-19}{21}$ proved.

Step-by-step explanation:

Explanation:

Given in the question, a = $\frac{-19}{21}$

So, according to the question we need to prove that, -(-a) = a

As we know that sign property, the outcome is positive if both values are positive.

• The outcome is good if both numbers are negative.

• The two negative values essentially cancel one other out.

• The outcome is negative if one number is positive and the other is negative.  

• On multiplying two negative numbers, the result is positive.

Step 1:

From the question we have, -(-a) = a    

We need to prove that LHS = RHS

LHS = -(-a)

⇒ - (-a) = - ($\frac{-(-19)}{21}$) = $\frac{-19}{21}$

RHS = a = $\frac{-19}{21}$.

Here, we see that, LHS = RHS.

Final answer:

Hence, here we proved that, -(-a) = a.

#SPJ2