Ask a Doubt
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, 13:21: 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, 17:37: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Maths
a fraction became 9 upon 11 if 2 is add to the both and 3 is add to both 5 upon 6 find the fraction
Asked by dheerrana109 | 22 Jul, 2024, 10:26: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
6x²+x-1
Asked by ishakkumbhar92 | 20 Jul, 2024, 16:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
the peth of an APq and qth term is p find its p+q(th)term
Asked by vishwanathhikkalagutti | 17 Jul, 2024, 07:25: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
if 3 meter cloth price 400 then 75 centimeter cloth price
Asked by avadheshkumar94 | 13 Jul, 2024, 20:18: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
show That points(1,-1),(5,2)and(9,5)are collinear
Asked by 3ra2231 | 11 Jul, 2024, 20:55: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
What is réal number
Asked by avadheshkumar94 | 10 Jul, 2024, 10:14: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
prove that sinA-cosA+1/sinA+cosA-1 =1/secA-tanA
Asked by syashkurun | 08 Jul, 2024, 19:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
what is the angle between two parallel lines
Asked by francissaka528 | 08 Jul, 2024, 06:15: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
solve the following pair of linear equation 5x+4y=9 , x + 2y =3
Asked by radhe9868017031 | 05 Jul, 2024, 14:10: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
5x-4y+8=0, 7x+6y-9=0 consistent or inconsistent
Asked by naidulokesh892 | 04 Jul, 2024, 20:42: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Are You a Teacher or a Parent Seeking Customised Tests? Click here
×