Secondary School (English Medium) (5 to 8) Class 8 - CBSE Question Bank Solutions

Find and correct the errors in the statement: x(3x + 2) = 3x² + 2

Find and correct the errors in the statement: 2x + 3y = 5xy

Find and correct the errors in the statement: x + 2x + 3x = 5x

Find and correct the errors in the statement: 5y + 2y + y − 7y = 0

Find and correct the errors in the statement: 3x + 2x = 5x²

Find and correct the errors in the statement: (2x)² + 4(2x) + 7 = 2x² + 8x + 7

Find and correct the errors in the statement: (2x)² + 5x = 4x + 5x = 9x

Find and correct the errors in the following mathematical statement. Substituting x = −3 in 

x² + 5x + 4 gives (−3)² + 5 (−3) + 4 = 9 + 2 + 4 = 15

Find and correct the errors in the following mathematical statement. Substituting x = −3 in 

 x² − 5x + 4 gives (−3)² − 5 (−3) + 4 = 9 − 15 + 4 = −2

Find and correct the errors in the following mathematical statement. Substituting x = −3 in  x² + 5x gives (−3)² + 5 (−3) = −9 − 15 = −24

Find and correct the errors in the statement: (y − 3)² = y² − 9

Find and correct the errors in the statement: (z + 5)² = z² + 25

Find and correct the errors in the statement: (2a + 3b) (a − b) = 2a² − 3b²

Find and correct the errors in the statement: (a + 4) (a + 2) = a² + 8

Find and correct the errors in the statement: (a − 4) (a − 2) = a² − 8

Find and correct the errors in the statement: `(3x^2)/(3x^2) = 0`

Find and correct the errors in the statement: `(3x^2 + 1)/(3x^2) = 1 + 1 = 2`

Find and correct the errors in the statement: `(3x)/(3x + 2) = 1/2`

Find and correct the errors in the statement : `3/(4x + 3) = 1/(4x)`