Show all work to solve 3x2 - x - 2 = 0.

The roots of are

Solution:

Given,

The given equation is in the format

Here, a=3; b=-1; c=-2

The roots of a quadratic function are given by the quadratic formula,

On substituting the values we get,

On solving we get,

Square root of 25 is 5,

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -