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 - Mathematics

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

For x = −3,

x² + 5x + 4 = (−3)² + 5 (−3) + 4 = 9 − 15 + 4 = 13 − 15 = −2

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Chapter 14: Factorisation - Exercise 14.4 [Page 229]

Chapter 14 Factorisation
Exercise 14.4 | Q 10.1 | Page 229

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

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

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 statement: (y − 3)² = y² − 9

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

Identify the errors and correct them

7y² – y² + 3y² = 10y²

Identify the errors and correct them

(x – 2)(x + 3) = x² – 6