Question

a+b=7,ab=2 find a+b and a^4+b^4​

Answer 1

Answer:

a+b=7,ab=2 find a+b and a^4+b^4​

Step-by-step explanation:

There are a variety of methods to solve this pair of linear equations. But I find this the easiest:

a + b = 6 ————- (1)

a - b = 4 —————(2)

Now, adding equations (1) and (2)

a + b + a - b = 6 + 4

2a = 10

a = 5

Now, putting the value of a in equation (1)

a + b = 6

5 + b = 6

b = 6–5

b = 1

We need to find the value of ab

So,

ab = 5 (1) = 5

Therefore,

ab = 5

Hope it helps :)