Question

find, if (x - 5) is a factor of 3x^4+5x^3 - 2x^2 - 4

Answer 1

let f(x)= 3x^4+5x^3 - 2x^2 - 4

X-5=0
X=5

now,
f(5)= 3*5^4+5*5^3 - 2*5^2 - 4

= 3*625 +5*125-2*25-4
=1875+625-50-4
=2446 ans

Answer 2

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