Question

6) if (x2 + ax - 10) ÷ (x + 2) = (x - 5), then a =

Answer 1

-3

x2+ax-10=(x+2)(x-5)

x2+ax-10=x2-3x-10

(a+3)x=0

a=-3

Answer 2

(x² + ax - 10) ÷ (x + 2) = (x - 5)

* (x + 2) * (x + 2)

x² + ax - 10 = (x - 5)(x + 2)

x² + ax - 10 = x² -3x - 10

-x² +10 -x² +10

ax = -3x

`(ax)/(x)`
`(-3x)/(x)`

a = -3

Answer: a = -3