Question

if a + b = 15
ab = 56
find a and b​

Answer 1

Answer:

a=8. and b=7

Step-by-step explanation:

a=8. and b=7

Answer 2

Answer:

7 & 8

Step-by-step explanation:

a + b = 15

a = 15 - b

Given,

ab = 56

= ( 15 - b ) b = 56

= 15b - b² = 56

= b² - 15b + 56 = 0

= b² - 7b - 8b + 56 = 0

= b ( b - 7 ) - 8 ( b - 7 ) = 0

= ( b - 8 ) ( b - 7 ) = 0

b = 7 or 8

If b = 7 , a = 8

if b = 8 , a = 7

Hence , a and b are 7 & 8

pls mark me as the brainliest