Question

pls help me all 3 pls​

Answer 1

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Answer 2

Answer:

answer 5)

0.235235235 = 0.235 bar so,,

let x = 0.235235......-----1

multiply both sides by. 1000

1000x = 235.235235....-------2

subtracting 1 from 2

1000x-x= 235.235235......-0.235235....

999x= 235

x = 235/ 999

answer 6)

(2+√2)²= (a+b)²

a²+b²+2ab

2²+√2²+2×2×√2

4+2+4√2.

6+4√2 yes it is irrational no.

answer 7)

(9x+2y+z)²= (a+b+c)²

a²+b²+c²+2ab+2bc+2ca

9x²+2y²+z²+2*9x*2y +2*2y*z+2*z*9x

81x²+4y²+z²+36xy+4yz+18zx

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