Question

if [x-2] is a factor of ax4+2x- 3x2+bx-4 then the value of 8a-b is
10
-10
20
-20

Answer 1

Answer:

6 a x - 4 a y - 3 b x + 2 b y = (6 a x - 3 b x) + (2 b y - 4 a y) = 3 x (-b + 2 a) - 2 y (-b ... If a polynomial with integer coefficients has a rational factor of the form ... (5x-4)(2x+3)=0 i.e. A*B=0 so either A or B is zero.

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