1.

9. If a - b = 4 and a + b = 6; find :(1) a² +b^2(ii) ab​

Answer»

Step-by-step explanation:

a-b = 4________(i)

a+b =6________(II)

From EQUATION (i) and (ii)

a-b+a+b=10

2a=10

\tt \: a = \frac{10}{2} = 5

and b= 1

After FIND the VALUE of a=5 and b=1 ,

\tt(1) \: \: \: {a}^{2} + {b}^{2} \\ \\ \tt = {5}^{2} + {1}^{2} \\ \\ \tt = 25 + 1 = 26

AND

(2). ab

5×1=5


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