If: A(x)= x4-3x2+x+2 B(x)= 2x2+3x C(x)= 2x3+3x2+4x-3.
Calcule: a) A(x) − [B(x) + C(x)]= b) A(x) · B(x)=

2- Divide:
a) (x4-13x2+36) : (x-3) = b) (x4-5x3+3x-9) : (x+2)=

3- Factorize
a) A(x)= x2- 8x+16 b) B(x)= x4- 1

solve: √x − 9 + 1 = √x − 2

solve: 4x4-5x2+1=0

solve: x=2·y
x + y = 45

The perimeter of a rectangle measures 42 cm and the diagonal is 15 cm. Find the area of the rectangle.

A rectangular plot has an area of 37500 m2, if the base measures 100 m
more than the height, what are the dimensions of the plot?