Question

Consider the expressions 3x(x - 2) + 2 and 2x2 + 3x – 16.

Answer 1

Start finding the corresponding values for x=3 on both expressions

$\begin{gathered} 3x(x-2) \\ x=3 \\ 3\ast(3)\ast(3-2) \\ 3\ast3\ast1 \\ 9 \end{gathered}$$\begin{gathered} 2x^2+3x-16 \\ for\text{ x=3} \\ 2(3)^2+3(3)-16 \\ 2\ast9+9-16 \\ 18+9-16 \\ 11 \end{gathered}$$\begin{gathered} 2x^2+3x-16 \\ for\text{ x=3} \\ 2(3)^2+3(3)-16 \\ 2\ast9+9-16 \\ 18+9-16 \\ 11 \end{gathered}$$\begin{gathered} 2x^2+3x-16 \\ for\text{ x=3} \\ 2(3)^2+3(3)-16 \\ 2\ast9+9-16 \\ 18+9-16 \\ 11 \end{gathered}$

then, prove the expression for x=6

$\begin{gathered} 3x(x-2) \\ x=6 \\ 3\ast(6)\ast(6-2) \\ 3\ast6\ast4 \\ 72 \end{gathered}$

$\begin{gathered} 2x^2+3x-16 \\ x=6 \\ 2(6)^2+3(6)-16 \\ 74 \end{gathered}$

ANSWER:

9,11

72,74

PROBABLY ARE NOT