Question

Ex. IfA= {1,3,4,7,8} then write all possible subsets of A.
i.e. P= {1,3},
T= {4,7,8), V= {1, 4, 8},
S = {1,4,7,8)​

Answer 1

Step-by-step explanation:

−5 is a root of quadratic equation 2x²+px−15=0

so, 2(−5)²+p(−5)−15=0

=>50−5p−15=0

=>35−5p=0

p=7

now, put p=7 in second quadratic equation,

p(x²+x)+k=0

=>7(x²+x)+k=0

=>7x²+7x+k=0

above equation has equal roots

so,D=b²−4ac=0

=>7²−4×7×k=0

=>7−4k=0

=>k=7/4=1.75

hence, the value of k=1.75

Answer 2

Answer:

k=1.75

I hope this is helpful for you