Question

Determine whether the volues given against the equations the quadratics equations are the roots of the equation or not x*2+4x-5=0.:x=1,-1​

Answer 1

check

p(x) = x²+4x-5=0

when x= 1

p(1) = 1² +4×(1) -5 = 0

hence 1 is root of this equation

when x= -1

p(-1) = -1² +4×(-1)-5 = 1-4-5 = -8

hence -1 is not root of this equation