Question

If one of the zeros of the quadratic polynomial , p(x)= 2x²+ kx - 40 is 5, then K is equal to *​

Answer 1

Answer:

k = -2

Step-by-step explanation:

p(x)=>2x²+ kx - 40=0

p(5)=>2(5)²+ k(5) - 40=0

p(5)=> 2×25+ 5k - 40=0

p(5)=>50+ 5k - 40=0

p(5)=>10+ 5k =0

p(5)=>5k = -10

p(5)=>k = -10

5

p(5)=>k = -2