Question

Simplify 2x( 3x -5) + 3 ( x – 3) for x= 2​

Answer 1

Answer:

3

x

3

−3a

2

x

2

b+3ab

2

x−b

3

We know, (a−b)

3

=a

3

−3a

2

b+3ab

2

−b

3

Using this identity,

(ax)

3

−3(ax)

2

b+3(ax)(b)

2

−(b)

3

⇒(ax−b)

3

∴a

3

x

3

−3a

2

x

2

b+3ab

2

x−b

3

=(ax−b)

3

.

Hence, the answer is (ax−b)

3

.

Answer 2

Answer:

2x(3x-5)+3(x-3)

for x=2,

2.2(3.2-5)+3(2-3)

= 4(6-5)+3(-1)

= 4-3

=1

hope it helps.!!