Question

Using Algebraic Expression,
Simplify (do NOT use linear equation)

210000 + 4200x + 21x²

Answer 1

$21 {x}^{2} + 4200x \: + 210000$

$21 {x}^{2} + 2100x + 2100x + 210000$

$21x(x + 100) + 2100(x + 100)$

$(x + 100)($ (21x +2100)

Answer 2

$21 {x}^{2} + 4200x + 210000 \\ 21 {x}^{2} + 2100x + 2100x + 210000 \\ 21x(x + 100) + 2100(x + 100) \\ (21x + 2100)(x + 100)$
21x=----2100 /x+100
x=----100. /x=---100
Hope u have got it out