Question

If a + b = 3 and ab = 2 find

i) a – b

ii) a
2
– b2​

Answer 1

Answer:

1

Devanshk

25.04.2018

Math

Primary School

+5 pts

Answered

If a+b= 3, ab =2 find the value of a²+ b²

2

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Ramanujmani

Ace

197 answers

30.7K people helped

Heya...!!!

Given that:-

a + b = 3 , & ab = 2

NOW,

we know that:-

(a + b)² = a² + b² + 2ab

Now,

(a + b) = 3

[ On SQUARING both side]

(a + b )² = 3²

a² + b² + 2ab = 9

=> a² + b² + 2×2 = 9

=> a² + b² = 9 - 4

=> (a² + b²) = 5

Step-by-step explanation:

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