Question

-2 is the root of the quadratic equation x²-7x+k=0 value of k is?​

Answer 1

Answer:

it is given that -2 is one of

the root of the quadratic equation

x² - 7x + k = 0

(-2)² - 7(-2) + k = 0

4 + 14 + k = 0

18 + k = 0

∴ k = -18

Step-by-step explanation:

Answer 2

we have two roots of quadratic equations.

x²-7x+k=0

sum of roots = -2 + alpha =7 alpha =9.

product of roots= 9x-2 =k

k = -18.