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Ncert Solutions for Factorization Class 8 Mathematics Chapter 14 CBSE Part 4





In this page we have NCERT book Solutions for Class 8th Mathematics:Factorization Chapter 14 for EXERCISE 4 . Hope you like them and do not forget to like , social share and comment at the end of the page.
Question 1   
Find and correct the errors in the statement: 4(x - 5) = 4x - 5

Answer
LHS =4(x-5) = 4x-20
RHS = (4x-5)
LHS≠ RHS
Correct statement would be
4(x-5) = 4x-20
Question 2   
Find and correct the errors in the statement: x(3x + 2) = 3x2 + 2

Answer :
LHS = x(3x + 2) = 3x2 + 2x
RHS = 3x2 + 2
LHS≠ RHS
Correct statement would be
x(3x + 2) = 3x2 + 2x
Question 3 :  
Find and correct the errors in the statement: 2x + 3y = 5xy

Answer :
LHS = 2x + 3y
RHS = 5xy
LHS≠ RHS
Correct statement would be
2x + 3y = 2x+3y
Question 4   
Find and correct the errors in the statement: x + 2x + 3x = 5x

Answer :
LHS = x + 2x + 3x= 6x
RHS = 5x
LHS≠ RHS
Correct statement would be
x + 2x + 3x= 6x
Question 5   
Find and correct the errors in the statement: 5y + 2y + y - 7y = 0

Answer
LHS = 5y + 2y + y - 7y = y
RHS = 0
LHS≠ RHS
Correct statement would be
 5y + 2y + y - 7y = y
Question 6   
Find and correct the errors in the statement: 3x + 2x = 5x2

Answer
LHS = 3x + 2x =5x
RHS = 5x2
LHS≠ RHS
Correct statement would be
3x + 2x =5x
Question 7   
Find and correct the errors in the statement: (2x)2 + 4(2x) + 7 = 2x2 + 8x + 7

Answer :
LHS = (2x)2 + 4(2x) + 7 =4x2 +8x+7
RHS = 2x2 + 8x + 7
LHS≠ RHS
Correct statement would be
(2x)2 + 4(2x) + 7 =4x2 +8x+7
Question 8   
Find and correct the errors in the statement: (2x)2 + 5x = 4x + 5x = 9x

Answer
LHS = (2x)2 + 5x =4x2+5x
RHS = 4x + 5x =9x
Third = 9x
LHS≠ RHS =third part
Correct statement would be
(2x)2 + 5x = 4x2+5x
Question 9   
Find and correct the errors in the statement: (3x + 2)2 = 3x2 + 6x + 4

Answer
LHS = (3x + 2)2 =9x2 +12x+4
RHS = 3x2 + 6x + 4
LHS≠ RHS
Correct statement would be
(3x + 2)2 =9x2 +12x+4
Question 10   
Find and correct the errors in the statement: (y - 3)2 = y2 - 9

Answer
LHS = (y - 3)2 =y2 -6y+9
RHS = y2 - 9
LHS≠ RHS
Correct statement would be
(y - 3)2 =y2 -6y+9
Question 11   
Find and correct the errors in the statement: (z + 5)2 = z2 + 25

Answer
LHS= (z + 5)2 =z2 +10z+25
RHS = z2 + 25
LHS≠ RHS
Correct statement would be
(z + 5)2 =z2 +10z+25
Question 12   
Find and correct the errors in the statement: (2a + 3b) (a - b) = 2a2 - 3b2

Answer
LHS= (2a + 3b) (a - b)=2a2 -2ab+3ab-3b2=2a2 +ab-3b2
RHS = 2a2 - 3b2
LHS≠ RHS
Correct statement would be
(2a + 3b) (a - b)=2a2 +ab-3b2
Question 13   
Find and correct the errors in the statement: (a + 4) (a + 2) = a2 + 8

Answer
LHS= (a + 4) (a + 2) =a2 +2a+4a+8=a2 +6a+8
RHS = a2 + 8
LHS≠ RHS
Correct statement would be
(a + 4) (a + 2) =a2 +6a+8
Question 14   
Find and correct the errors in the statement: (a - 4) (a - 2) = a2 - 8

Answer
LHS= (a - 4) (a - 2) =a2 -2a-4a+8=a2 -6a+8
RHS = a2 - 8
LHS≠ RHS
Correct statement would be
(a - 4) (a - 2) =a2 -6a+8
Question 15   
Find and correct the errors in the statement:  3x2/3x2  =0

Answer
LHS= 3x2/3x2  =1
RHS =0
LHS≠ RHS
Correct statement would be
3x2/3x2  =1
Question 16   
Find and correct the errors in the statement: (3x2+1)/3x2 =  1+1=2

Answer
LHS= (3x2+1)/3x2 =  1 + 1/3x2
RHS =1+1
LHS≠ RHS
Correct statement would be
(3x2+1)/3x2 =  1 + 1/3x2
Question17   
Find and correct the errors in the statement: 3x/(3x+2) = 1/2

Answer
LHS= 3x/(3x+2)
RHS =1/2
LHS≠ RHS
Correct statement would be
3x/(3x+2) =3x/(3x+2)
Question 18   
Find and correct the errors in the statement:
3/(4x+3) =1/4x

Answer
LHS= 3/(4x+3)
RHS =1/4x
LHS≠ RHS
Correct statement would be
3/(4x+3) =3/(4x+3)
Question 19   
Find and correct the errors in the statement:
(4x+5)/4x =5

Answer
LHS= (4x+5)/4x =1 + 5/4x
RHS =5
LHS≠ RHS
Correct statement would be
(4x+5)/4x =1 + 5/4x
Question 20   
Find and correct the errors in the statement: (7x+5)/5  =7x
Answer
LHS= (7x+5)/5  = 7x/5 +1
RHS =7x
LHS≠ RHS
Correct statement would be
(7x+5)/5  = 7x/5 +1

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