• A. $\left(2y^2+6y+2\right)\left(y^2-3y+1\right)$
• B. $\left(2y^2-7y+1\right)\left(2y^2+7y+1\right)$
• C. $\left(2y^2+3y+1\right)\left(y^2-3y+1\right)$
• D. $2\left(y^2+3y+1\right)\left(y^2-3y+1\right)$

Answer: Option C

Explanation:

• A. $7-x$
• B. $5-x$
• C. $5+x$
• D. $12-x$

Answer: Option B

Explanation:

• A. $\frac{7}{3}$
• B. $3$
• C. $\frac{8}{3}$
• D. $2$

Answer: Option D

Explanation:

• A. 5
• B. 10
• C. 8
• D. 15

Answer: Option B

Explanation:

• A. ${\log }^2$
• B. ${\log }^3$
• C. ${\log }^5$
• D. ${\log }^7$

Answer: Option A

Explanation:

• A. (2, 1)
• B. (3, 1)
• C. (1, 2)
• D. (-1, -2)

Answer: Option C

Explanation:

• A. $x=1,y=-1$
• B. $x=1,y=1$
• C. $x=-1,y=-1$
• D. $x=-1,y=1$

Answer: Option D

Explanation:

• A. log 40
• B. log 30
• C. log 15
• D. log 18

Answer: Option A

Explanation:

• B. 3
• C. 1
• D. 2

Answer: Option C

Explanation:

• A. 476190 m
• B. 476.19 m
• C. 476190 cm
• D. 476.19 cm

Answer: Option A

Explanation:

• A. $3$
• B. $7$
• C. $5$
• D. $9$

Answer: Option B

Explanation:

• A. -1
• C. -9
• D. 9

Answer: Option D

Explanation:

• A. 3470000
• B. 34700000
• C. 347000000
• D. 347000

Answer: Option C

Explanation:

• A. $1$
• B. $2^{n+1 }$
• C. $3$
• D. $2^n$

Answer: Option B

Explanation:

• A. $1$
• B. $2^n-1$
• C. $2^n+1$
• D. $3^{n-1}$

Answer: Option C

Explanation: