Math, asked by varshasonawane46288, 8 months ago

6. a-b = 3 and ab = 10, Find a2 - b2
1) 7 2) 21
3) 30
4) 49

Answers

Answered by itzssummann

1

Answer:

21

Step-by-step explanation:

a-b=3

(a-b)^2=9

a^2+b^2-2ab=9

a^+b^2-2ab+4ab=9+4ab

a^2+b^2+2ab=9+40

(a+b)^2=49

a+b=7

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