Question

If X2+x-42=(x+k) (x+7). Find value of k in given equation

Answer 1

Answer:

k = -6

Step-by-step explanation:

x^2 +x - 42 ( L.H.S)

x^2 +7x-6x -42

x(x +7) -6 (x+7)

(x+7) (x-6)

so, (x+7) +( x-6)=(x+7) (x+k)

since x= -6