Question

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Answer 1

Step-by-step explanation:

$\underline{\textbf{\large {Answer:}}}$

$\sf x^4 + 4x^3 + 6x^2 + 4x +9 =12$

$\underline{\textbf{\large{Explanation:}}}$

[Refer the attachment .]

$\underline{\textbf{Formulae used }}$

1) Division algorithm :

dividend = divisor x quotient + remainder

2) algebraic identity :

(a + b) ² = a² + 2ab + b²

Answer 2

4x+64x+36x+4x=12-9
108x=3
x=3/108
x=36