Question

check if (a) 25×(-21)=(-25)×21

Answer 1

LHS=25*(-21)
=-525
RHS=(-25)*21
=525

Answer 2

Concept

In mathematics, Multiplication is one of the four arthmetic operations which is used to calculate product of numbers.

For example

1) 5*6 = 30

2) 15*3 = 45

Given

25×(-21)=(-25)×21

Find

Check LHS = RHS

Solution

Solving LHS

25 * ( -21)

= (-1) * 25 * 21

= (-1) * 525

= -525

Solving RHS

(-25)×21

= (-1) * 25 *21

= (-1) * 525

= -525

Hence LHS = RHS

We proved that 25×(-21)=(-25)×21

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