a polynomial ax3+bx2+cx+d intersects x axis at 1,-1 and y axis at 2 then value of b is??

Pv Aaditya

3 years, 3 months ago

f(1) = a+b+c+d = 0

f(-1) = -a + b -c +d = 0

Adding, we get, b+d = 0

f(0) = d = 2 => b = -2