Question

Show that x = 1 is the root of the equation x2 + 4x - 5 = 0​

Answer 1

Answer:

x^2+4x-5=0

=> x^2+5x-x-5=0

=> x(x+5)-1(x+5)=0

=> (x+5)(x-1)=0

x+5=0

x= -5

x-1=0

x=1 so, x=1 is the root of the equation