Substitution

Q.

The value of $(3x^2+5y^2)(4xy-5y)$, if the value of $x=2$ and $y=3$ is ___.

Q.

Evaluate $a^3$ x $3a^2$ x $-2a^7$ for $a=1$

1. 

2. 

3. 

4. 

Q.

Distance between Mumbai and Pune is $(2y^2+y+2)$. There are two routes to travel from Mumbai to Pune as shown in the figure.

What is the difference between the distance covered through the two routes?

1. 32 units
2. 23 units
3. 57 units
4. 34 units

Q.

Find the value of $m^2+7m-60$ when $m=-3$

1. 4(m-6)

2. 2(m+6)

3. (m+12)

4. None of these

Q.

The value of $(3x^2+5y^2)(4xy-5y)$, if $x=2$ and $y=3$ is $513$.

1. True

2. False

Q.

The value of $x(x+3)(x^2+6)$ when $x=2$ is

1. 10

2. 1

3. 100

4. 1000

Q.

The value of $3x^3{y}^2$ for $x=1$ and $y=2$ coincides with the value of $4a+b$ for $a=2$ and $b=4$.

1. True

2. False

Q.

The value of $abc(a^2+b^2)$ for $a=1$, $b=1$ and $c=2$ is:

1. 1

2. 4

3. 8

4. 2

Q.

Multiply the terms $-3x^2{y}^2,-2xy,2x^{2}y$ and verify the product for $x=1$ and $y=2$

1. 186

2. 190

3. 180

4. 192

Q.

What would be the final product when ethane reacts with excess chlorine in the presence of sunlight?

1. $C_{2}C{l}_6$
2. $C_2{H}_4$ + $HCl$
3. $C_2{H}_{4}C{l}_2$
4. $C_2{H}_{2}C{l}_4$