Question

If atb=15 and ab=56, ab
then find
a-b​

Answer 1

Answer:

1, -1

Step-by-step explanation:

a+b=15

ab=56

if a=7 b =8

7-8= -1

if a=8 b=7

8-7= 1

Answer 2

Answer:

Given

a+b=15

Squaring on both sides,

${(a + b)}^{2} = {15}^{2} \\ {a}^{2} + {b}^{2} + 2ab = 225 \\ {a}^{2} + {b}^{2} + 2ab - 4ab = 225 - 4ab \\ {(a - b)}^{2} = 225 - 4 \times 56 \\ {(a - b)}^{2} = 1 \\ a - b = 1$

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