20. a^2 - b^2= 36, a-b = 2, a + b =?
(b) 18 (c) 15
(c) 15 (d) 12
(a) 16
29
Answers
Answered by
8
Answer:
option (b) : 18
Step-by-step explanation:
a^2 - b^2 = 36
(a - b)(a + b) = 36
2(a + b) = 36 [value of (a - b = 2)]
(a + b) = 18
hope it help you mark me as brainlist
Answered by
1
Answer:
a^2 -b^2=36 is in the form of a^2-b^2=(a+b)(a-b)
36=(a+b)2 [substitute the given values]
36=2a+2b [let's take 2 as common as a and b have same co-efficients]
36=2[a+b]
36/2=a+b
18=a+b
answer is 18
Similar questions