Question

What isbthe value of p in x²-px+81

Answer 1

Answer:

may be 9.

Step-by-step explanation:

Answer 2

Answer:

'p' can be sum of any factors of 81

Step-by-step explanation:

1. because if u want to factorise the equation to find its roots(zeroes) we can find its factors
2. so to find the factors you need to find the number whose product is 81(ac) and sum is -p(b)
3. to find that u need to add the factors of 81 ,, (-1×-81) , (-9)(-9) , (-3)(-27) , ...... so on each should be negative because sun is '-ve' and the product is '+ve'
4. u need to find the sum of these factors = (-81-1)= -82 = -p ,, -(9+9)=-18=-p ,, -(27+3)=-30=-p ,, ...... so on