Question

13. यदि (a+b)= 12
तथा
(a-b)=2 हो तो a2-b2का मान ज्ञात कीजिए।
सभा में​

Answer 1

Step-by-step explanation:

a+b=12____1st

a-b=2_____2nd

1st___a=12-b

putting the value of a in the 2nd.....

12-b-b=2

12-2b=2

-2b=2-12

-2b=-10

b=-10/-2

b=5

put the value of b in the 1st equation........

a+5=12

a=12-5

a=7

now......a^2-b^2

7^2-5^2=49-25=24 answer........!!!!!!!!

hope this will help you

Answer 2

Answer:

given:-

(a+b)=12

(a-b) =2

formula :- (a2-b2)= (a-b) (a+b)

hence:-

(a2-b2)= 12×2

= 24 Ans.