Express each of the following products as a monomial and verify the result in each case for $x = 1$:
$(3x) \times (4x) \times (-5x)$

Given:

$(3x) \times (4x) \times (-5x)$

To do:

We have to express the given product as a monomial and verify the result for $x = 1$:

Solution:

$(3 x) \times(4 x) \times(-5 x) =3 \times 4 \times(-5) \times x \times x \times x$

$=-60 x^{3}$

If $x=1$, then

LHS $=(3 \times 1) \times(4 \times 1) \times(-5 \times 1)$

$=3 \times 4 \times(-5)$

$=-60$

RHS $=-60 x^{3}$

$=-60(1)^{3}$

$=-60 \times 1$

$=-60$

Therefore,

LHS $=$ RHS

Tutorialspoint

Updated on: 10-Oct-2022

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