Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 10 Answered

1.If f(x)=x³+x²-ax+b is divisible by x²-x write the values of a&b 2.If a-b,a,a+b are zeros of polynomial f(x)=2x³-6x²+5x-7,write the value of a.
Asked by CHIDAMBAR | 07 Oct, 2018, 01:21: PM
answered-by-expert Expert Answer
x³ + x² -ax + b is divisible by x² - x or x(x -1) 
 
x and (x -1) are the factors of x³ + x² -ax + b .
 
mean x(x - 1) = 0
 
x = 0 or x - 1 = 0
 
Therefore x = 0 and x = 1

0 and 1 the zeros of x³ + x² -ax + b.

1. Substituting x = 0, we get

(0)³ + (0)² -a(0) + b = 0
 b = 0

2. Substituting x = 1, we get
(1)³ + (1)² - a(1) + b = 0
1 + 1 - a + b = 0
2 - a + 0 = 0 
a = 2 
 
a = 2 and b = 0

Therefore value of a=2 and b = 0.


Answered by Yasmeen Khan | 07 Oct, 2018, 05:37: PM
CBSE 10 - Maths
Asked by sahooashutosh781 | 21 May, 2024, 01:26: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by sahooashutosh781 | 20 May, 2024, 01:41: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
..
question image
Asked by sweetsmiley9 | 20 May, 2024, 10:50: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by kmd568070 | 16 May, 2024, 12:12: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by vinitbathija26 | 11 May, 2024, 06:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by biswajitgope404 | 09 May, 2024, 09:30: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by vishalgunjan13 | 09 May, 2024, 02:13: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by mukammilh19 | 07 May, 2024, 02:28: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by laxman44verma | 01 May, 2024, 09:46: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by dagardisha39 | 28 Apr, 2024, 12:58: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
Get Latest Study Material for Academic year 24-25 Click here
×