Advertisements
Advertisements
Question
Find and correct the errors in the following mathematical statement. Substituting x = −3 in x2 + 5x gives (−3)2 + 5 (−3) = −9 − 15 = −24
Advertisements
Solution
For x = −3,
x2 + 5x = (−3)2 + 5(−3) = 9 − 15 = −6
APPEARS IN
RELATED QUESTIONS
Find and correct the errors in the statement: 4(x − 5) = 4x − 5
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 + 2)2 = 3x2 + 6x + 4
Find and correct the errors in the statement: (y − 3)2 = y2 − 9
Find and correct the errors in the statement: `(3x^2)/(3x^2) = 0`
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
– 3p2 + 4p – 7 = – (3p2 + 4p – 7)
