Question

Verify -25x[-4+(-6)]= (-25x-4) (-25x-6)​

Answer 1

LHS:-

$\\ \sf\longmapsto -25x\left[-4+(-6)\right]$

$\\ \sf\longmapsto -25x(-4-6)$

$\\ \sf\longmapsto -25x(-10)$

$\\ \sf\longmapsto 250x$

RHS:-

$\\ \sf\longmapsto (-25x-4)(-25x-6)$

$\\ \sf\longmapsto -25x(-25x-6)-4(-25x-6)$

$\\ \sf\longmapsto 25x^2-150x+100x+24$

$\\ \sf\longmapsto 25x^2-50x+24$

Therefore

$\\ \sf\longmapsto LHS\neq RHS$

Answer 2

Answer:

If we multiply (−8x

2

y

6

) to (−20xy) then we get,

(−8x

2

y

6

)×(−20xy)

=(−20)×(−8)×x

3

×y

7

=160x

3

y

7

.

Now if x=2.5=

2

5

and y=1 then we get,

160×

2

3

5

3

×1

7

=160×

8

125

×1

=20×125

=5,000.