Using the rational root theorem, what are all the rational roots of the polynomial f(x) = 20x^4+x^3+8x^2+x-12?
a) -4/5 and 3/4
b) -4/5 and -3/4
c) -1, -4/5, 3/4 and 1
d) -1, -4/5, -3/4 and 1

answer is a for e2020, just took the test, family.

an

y = 6x -3y -12

y +3y +12 = 6x

=> . x = { 2y / 3 +2 } this is equation of line in terms of x

=> . if line meets the x-axis the co-ordinates of meeting point would be ( x , 0 )

=> . x = 2 ( 0 ) / 3 + 2

=> . x = 2

so, the point is ( 2 , 0 )

126 maybe. sorry