Question

If a+b=7 and a*b=10 ;find a-b

Answer 1

Answer:

3 is the answer first squaring a+b then value of a^2 +b^2 will come

Answer 2

Answer:

(a+b)²= a²+ b² +2ab

7²= a²+ b²+2×10

49-20=a² +b²

29- 2ab=a² +b²-2ab

29-20=(a- b )²

9 =( a- b)²

/9=a-b

3 =a- b

Step-by-step explanation:

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