Question

what are two numbers whose product is 81 and their sum is -18

Answer 1

Answer:

-9 and

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Answer 2

Step-by-step explanation:

Suppose two number are x and y

according to question

x×y=81

x+y=-18

We know that

(x-y²)=(x+y)²-4xy

(x-y²)=(-18)²-4×81

(x-y)²=324- 324

(x-y)²=0

x-y=0

x+y=-18

2x=-18

compare equcation (1) and(2)

we get

x=-9

y=-9