Question

5x^2 + 21x + 4 by x+4​

Answer 1

Step-by-step explanation:

first we will multiply x by 5x^2+21x+4

hence,

5x^3+21x^2+4x

then we will multiply 4 by all

hence,

20x^2+84x+16

:: (5x^3+21x^2+4x)+( 20x^2+84x+16)

reassemble::

5x^3+21x^2+20x^2+4x+84x+16

it will::

5x^3+41x^4+88x+16

Answer 2

The answer will be 0

Here is your explanation

5x^2+21x+4 by x+4

x+4=0

x= -4

5(-4)^2+21(-4)+4

5×16-84+4

80-84+4

84-84

0