91Ó°ÊÓ

Use factoring to solve quadratic equation. Check by substitution or by using a graphing utility and identifying \(x\)-intercepts. \(y(y+8)=16(y-1)\)

Now let's move on to factorizations that may require two or more techniques. In Exercises \(17-80,\) factor completely, or state that the polynomial is prime. Check factorizations using multiplication or a graphing utility. $$y^{3}+2 y^{2}-4 y-8$$

$$\text { In Exercises } 43-66, \text { factor completely.}$$ $$2 r^{3}+8 r^{2}+6 r$$

Now let's move on to factorizations that may require two or more techniques. In Exercises \(17-80,\) factor completely, or state that the polynomial is prime. Check factorizations using multiplication or a graphing utility. $$y^{3}+2 y^{2}-y-2$$

Factor each polynomial using the negative of the greatest common factor. $$-18 x^{4}+9 x^{3}+6 x^{2}$$

Use the method of your choice to factor each trinomial, or state that the trinomial is prime. Check each factorization using FOIL multiplication. $$15 x^{2}-31 x y+10 y^{2}$$

Use factoring to solve quadratic equation. Check by substitution or by using a graphing utility and identifying \(x\)-intercepts. \(y(y+9)=4(2 y+5)\)

In Exercises \(45-66,\) factor any perfect square trinomials, or state that the polynomial is prime. $$x^{2}+24 x+144$$

Factor each polynomial using the negative of the greatest common factor. $$-4 a^{3} b^{2}+6 a b$$

Use factoring to solve quadratic equation. Check by substitution or by using a graphing utility and identifying \(x\)-intercepts. \(4 y^{2}+20 y+25=0\)