please answer question-10, 16, 17, 18
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10.
putting x=0
we got d=0
we have
ax³+bx²+cx
take x common
x(ax²+bx+c)
product of other zeroes =c/a
16.)sum of roots=(-k)
product=k
case 1
k is negative
sun is positve and product is negative
means the roots have different signs
case 2
k is positive
sum is negative and product is positive
means both roots have same sign and are negative
answer is (a) they can't be both positive
17)let's the roots be p and p
product=p²=c/a
c/a is positive
hence c and a must have same signs
sum =2p=-b/a
answer is (c)
18)sum of roots=-b/a
sun of roots taken two at a time=4/a
option B
product=-7/a
next time ask questions seperately it's hard to solve this way
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