Which of the following is NOT irrational ?
a 3 +root7
c) 3-root7
b) (3 + root7) (3 - root7)
d) 3root7
Answers
Answered by
13
Step-by-step explanation:
Answer is option b) ( 3 + √7 ) ( 3 - √7 )...ok..
( 3 + √7 ) ( 3 - √7 )
= (3)² - (√7)²
= 9 - 7
= 2..
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Answered by
1
Answer:
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