If (x+2) and (x+3) are the factors of x³+ax+b, then values of a and b are
=> -19,-30
=> 19,30
=> 19,-30
=> -19,30
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Answered by
1
Answer:
19,-30
a=19 and b= -30
Step-by-step explanation:
x+2=0
x= -2
p(-2)=(-2)^3 + a×(-2) + b
= -8 + (-2a) + b
= -8 -2a +b
8= -2a +b ..........(i)
x+3=0
x= -3
p(-3)=(-3)^3 + a×(-3) + b
= -27 + (-3a) +b
= -27 -3a +b
27= -3a +b ............(ii)
Subtracting eq (i) and (ii)
27= -3a + b
-8= 2a - b
19= -a
a= -19
Putting a= -19 in eq (i)
8 = -2× -19 +b
8= 38 + b
8 - 38 = b
-30 = b
a= 19 and b= -30
Answered by
4
Answer:
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