Question

is (x+9) a factor of x²+4x-285
plz show using working​

Answer 1

Answer:

X+9 = 0

Therefore, x= -9

Putting the value of (x=-9) in the eqn x^2+4x-285

x^2+4x-285

(-9) ^2+4×(-9)-285

162- 36 -285

126 - 285

159

Therefore , (x+9) is not a factor of x^2+ 4x -285 .

Hope it helps you !!!!