Question

If x power 2 - x- 6 and x power 2+3x- 18 have a common factor ( x -a ) then find the value of a ​

Answer 1

a = 3

Explanation:

Factorise both expressions\x² - x - 6 = (x - 3)(x + 2)

x² + 3x - 18 = (x - 3)(x + 6)

Thus both expressions have a common factor of (x - 3) , thus

a = 3