Solve each equation for x. a) x-1=0b) x+1=0 c) x²-1=0 d) x²+1=0

Answer

given,

a) x-1=0

adding both side with 1

x = 1

b) x + 1 = 0

subtracting both side by 1

x = - 1

c) x² - 1 = 0

x² = 1

taking square root

x = √1

x = 1

d) x² + 1 = 0

x² = - 1

taking square root

x = √-1

x = i (iota)