Question

Solve using the quadratic formula:(ii) x² - x - a (a+1) = 0​ for only icse students they can only solve it answer= –a,a+1​

Answer 1

Answer:

a + 1; ( -a )

Step-by-step explanation:

x = { 1 + (-) squrt( 1 + 4* 1* a(a +1) )} / (2* 1)

= { 1+ (-) squrt ( 4a^2 + 4a +1 ) } / 2

= { 1 +(-) (2a +1) } / 2

= (a + 1) ; (-a)