Question

solve using quadratic formula :
x²- x - a(a+1) = 0
answer : -a , a+1

Answer 1

solution:-

given:-

》x²- x - a(a+1) = 0

》 x^2-xa-x+xa-a^2-a

》x(x-a-1)+a(x-a-1)

》(x-a-+)(x+a) ans