factor the quadtric expression completely and find the roots for the expression 20x+13x+2

Question

factor the quadtric expression completely and find the roots for the expression  20x+13x+2

anonymous · Answer

u mean 20x^2?

anonymous · Answer

( 5x  + 2   )( 4x   + 1 )

the roots if this = 0
are -2/5 , -1/4

anonymous · Answer

i assumed u meant 20x^2

anonymous · Answer

it is not a quad equation!

anonymous · Answer

yes

anonymous · Answer

how did you find those roots @jimmy rep

anonymous · Answer

first factorised to get 2 factors
when two items multiplied together = 0
then one of them must also = 0

amistre64 · Answer

20x^2+13x+2

20(2) = 40

1,40
2,20
4,10
8,5 ... 8 +5 = 13 ....

(x+8/20) (x+5/20) ; reduce

(x+2/5) (x+1/4)  ; stick bottoms in front

(5x+2) (4x+1)

amistre64 · Answer

to determine the roots we can stop at:

(x+2/5) (x+1/4) ; and solve for 0 :)


x = -2/5  and  x = -1/4