Question

Find the value of ab,if a+b=4 and a-b=2.​

Answer 1

Answer:

3

Step-by-step explanation:

a+b=4

a-b=2

adding both we get,

2a=6

a=3 then from first equation b=4-3=1

hence ab=3×1=3

Answer 2

a + b = 4

》a = 4 - b

a - b = 2

》(4 - b) - b = 2

》4 - 2b = 2

》-2b = 2 - 4

》b = 1

a = 4 - b

》a = 4 - 1

》a = 3

So, ab = 3 × 1 = 3.

Hope you understood...