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: 2x + 3y = 5xy
Find and correct the errors in the statement: 5y + 2y + y − 7y = 0
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: (a + 4) (a + 2) = a2 + 8
Find and correct the errors in the statement: `(3x)/(3x + 2) = 1/2`
Find and correct the errors in the statement: `(4x + 5)/(4x) = 5`
Identify the errors and correct them
7y2 – y2 + 3y2 = 10y2
Identify the errors and correct them
6xy + 3xy = 9x2y2
Identify the errors and correct them
m(4m – 3) = 4m2 – 3
