Advertisements
Advertisements
Question
Find and correct the errors in the statement: (z + 5)2 = z2 + 25
Advertisements
Solution
L.H.S = (z + 5)2 = (z)2 + 2(z)(5) + (5)2 [(a + b)2 = a2 + 2ab + b2]
= z2 + 10z + 25 ≠ R.H.S
The correct statement is (z + 5)2 = z2 + 10z + 25
RELATED QUESTIONS
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 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: `(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)`
Find and correct the errors in the statement: `(4x + 5)/(4x) = 5`
Find and correct the errors in the statement: `(7x + 5)/5 = 7x`
Identify the errors and correct them
7y2 – y2 + 3y2 = 10y2
