1. a farmer has 1442 meters of fencing available to enclose a rectangular portion of his land. One side of the rectangle being fenced lies along a river, so only three sides require fencing.
(a) express the area A of the rectangle as a function of x, where x is the
length of the side parallel to the river.
(b) for what value of x is the area largest
2. Use synthetic division to complete the indicated factorization.
x4 -2x3-25x2+26x+120=(x-3)(x+2)( )
A: x2-x-19 B: x2+x+20 C: x2-x-20 D: x2-2x-19
3. Given that one zero of P(x)=x3+7x2-23x-185 is 6-i, which of the following is also a zero of P(x)?
A: 6-I B: -6+I C: 1-6i D: -1-6i
4. Find the complete factorization of 2x4+3x3-12x2-7x+6 if (2x-1) is one of the factors