Question

in a-b=4 , ab=45, find a²-63​

Answer 1

Answer:

solutions here

Step-by-step explanation:

solutions here

Answer 2

Answer:

(a-b)² = 4²

a²+b²-2ab = 16

a²+b² - 90(i.e. 2×45) =16

a²+b²=106