Identify the errors and correct them (4n)2 – 2n + 3 = 4n2 – 2n + 3

Identify the errors and correct them

(4n)² – 2n + 3 = 4n² – 2n + 3

Sum

(4n)² – 2n + 3 = 16n² – 2n + 3

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Chapter 3: Algebra - Exercise 3.2 [Page 86]

Chapter 3 Algebra
Exercise 3.2 | Q 6. (iv) | Page 86

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

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

Find and correct the errors in the statement: (3x + 2)² = 3x² + 6x + 4

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: (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: `(3x^2 + 1)/(3x^2) = 1 + 1 = 2`