Verify $a-(-b)=a+b$ for the following values of $a$ and $b$.
(i) $a=21, b=18$
(ii) $a=118, b=125$
(iii) $a=75, b=84$
(iv) $a=28, b=11$
Given:
Some values of $a$ and $b$.
To do:
We have to verify whether $a\ -\ ( -b) \ =\ a\ +\ b$
Solution:
We know that,
$(-) \times (-) = (+)$
Therefore,
(i) $a = 21, b = 18$
This implies,
$a\ -\ (-b)\ =21\ -\ (-18)$
$=\ 21\ +\ 18$
$=\ 39$
$a+b=21+18$
$=39$
Hence, $a\ -\ ( -b) \ =\ a\ +\ b$.
(ii) $a = 118, b = 125$
This implies,
$a\ -\ (-b)\ =118- (-125)$
$=\ 118\ +\ 125$
$= 243$
$a+b=118+125$
$=243$
Hence, $a\ -\ ( -b) \ =\ a\ +\ b$.
(iii) $a = 75, b = 84$
This implies,
$a - (-b) =75 - (-84)$
$=\ 75\ +\ 84$
$=\ 159$
$a+b=75+84$
$=159$
Hence, $a\ -\ ( -b) \ =\ a\ +\ b$.
(iv) $a = 28, b = 11$
This implies,
$a - (-b) =28 - (-11)$
$=\ 28\ +\ 11$
$=\ 39$
$a+b=28+11$
$=39$
Hence, $a\ -\ ( -b) \ =\ a\ +\ b$.
Hence, we can see that in every case $a\ -\ (-b)\ =\ a\ +\ b$.
Related Articles
- Verify$a\ -\ ( -b) \ =\ a\ +\ b$ for the following values of a and b.(i) a = 21, b = 18(ii) a = 118, b = 125(iii) a = 75, b = 84(iv) a = 28, b = 11
- Verify $a-( -b)=a+b$ for $a=21,\ b=18$.
- Verify that $a ÷ (b+c) ≠ (a ÷ b) + (a ÷ c)$ for each of the following values of $a,\ b$ and $c$.(a) $a=12,\ b=- 4,\ c=2$(b) $a=(-10),\ b = 1,\ c = 1$
- If $a=2$ and $b=-2$ find the value of $(i)$. $a^2+b^2$$(ii)$. $a^2+ab+b^2$$(iii)$. $a^{2}-b^2$
- Verify the following properties for the given values of a, b, c. $a=-3, b=1$ and $c=-4$.Property 1: $a\div (b+c) ≠ (a÷b) +c$Property 2: $a\times (b+c) =(a\times b)+(a\times c)$Property 3: $a\times (b-c)=(a\times b) -(a\times c)$
- Choose the correct option by matching equivalent fractions:i) $\frac{260}{360}$ a) $\frac{1}{11}$ii) $\frac{11}{121}$ b) $\frac{1}{4}$iii) $\frac{6}{106} c) $\frac{13}{18}$iv) $\frac{25}{100}$ d) $\frac{3}{53}$A) i - a , ii - b , iii - c , iv - dB) i - c , ii - a , iii - d , iv - bC) i - b , ii - d , iii - a , iv - cD) i - c , ii - a , iii - b , iv - d
- If $a = 3$ and $b =-2$, find the values of:$a^a+ b^b$
- If $a = 3$ and $b =-2$, find the values of:$a^b + b^a$
- Find FIRST & FOLLOW for the following Grammar.\nS → A a A | B b B\nA → b B\nB → ε
- Find the sum:\( \frac{a-b}{a+b}+\frac{3 a-2 b}{a+b}+\frac{5 a-3 b}{a+b}+\ldots \) to 11 terms.
- Add the following:$a-b+a b, b-c+b c, c-a+a c$
- Factorise each of the following:$( i)$. $8a^{3}+b^{3}+12 a^{2} b+6 a b^{2}$$( iii)$. $27-125 a^{3}-135a+225a^{2}$
- If \( A=B=60^{\circ} \), verify that\( \cos (A-B)=\cos A \cos B+\sin A \sin B \)
- If \( A=B=60^{\circ} \), verify that\( \sin (A-B)=\sin A \cos B-\cos A \sin B \)
- Factorise each of the following:(i) \( 8 a^{3}+b^{3}+12 a^{2} b+6 a b^{2} \)(ii) \( 8 a^{3}-b^{3}-12 a^{2} b+6 a b^{2} \)(iii) \( 27-125 a^{3}-135 a+225 a^{2} \)(iv) \( 64 a^{3}-27 b^{3}-144 a^{2} b+108 a b^{2} \)(v) \( 27 p^{3}-\frac{1}{216}-\frac{9}{2} p^{2}+\frac{1}{4} p \)
Kickstart Your Career
Get certified by completing the course
Get Started