Question

factorise 2x^2 + 5 x - 10​

Answer 1

Answer:

x = -5+√55/4 , -5-√55/4

Step-by-step explanation:

a=2, b=5 , c=10

discriminant, D= b^2-4ac

=5^2-4*2*10

=25-80

=-55

x= -b+√D/2a. x= -b-√D/2a

= -5+√-55/2*2 = -5-√-55/2*2

= -5+√55/4. = -5-√-55/4