Question

if a+b =7 ab=6 find a^2-b^2

Answer 1

Answer:

35

Step-by-step explanation:

( a - b )² = ( a + b )² - 4ab

=> ( a - b )² = 7² - 4( 6 )

=> ( a - b )² = 49 - 24

=> ( a - b )² = 25

=> a - b = √25 = 5

( a + b) ( a - b) = 7 × 5

=> a² - b² = 35