Question

peove that 3-4 root 2 /7 is an irrational no. given that root 2 is an irrational number
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Answer 1

Answer:

Suppose

aal − b =r is rational.

Squaring this, a+b+2

ab =r 2

So, ab is irrational,if ab is irrational , this can not be hold .therefore ,if

ab is irrational, so is

a − b is rational

Since,(7−4 2 ) 2 =49−32−56 2

=17−56

22is irrational ,so is 17−56 2and so is .(7−4 2 )

Step-by-step explanation:

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