Let a, b and c be a real numbers such that

a) -a

b) bc

c) a-b

d)

sodni3
2021-03-09
Answered

Let a, b and c be a real numbers such that

a) -a

b) bc

c) a-b

d)

You can still ask an expert for help

Malena

Answered 2021-03-10
Author has **83** answers

(a) Here

Thus, sign of -a is negative .

(b) It is known that product of two negative number will be positive.

As

Thus, sign of bc is positive.

(c) It is known that when a negative number is subtracted from a positive number, the resultant number will be positive.

Here

Thus, sign of a-b is positive.

(d) Here

So ac and bc negative.

It is known that sum of two negative number will be negative.

Thus,

Thus, sign of

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