Which expression(s) below can best be factored by grouping?
there may be more than one correct answer. be sure to select all that apply.
7x3 – 3x2 + 5x – 8
8x3 + 4x2 – 10x – 5
9x2 – 16
4x2 + 20x + 25
15x8 – 3x5 + 10x3 – 2

option 1 is correct.

step-by-step explanation:

y varies inversely with x and constant of variation is 4

the equation will be:

y = k/x

where k =4 so,

y = 4/x

if we put values of x of option 1 in the above equation and find values of y

y = 4/-2 => y =-2

y = 4/-1 => y = -4

y = 4/1 => y = 4

y = 4/2 => y =2

so, all the values of x and y are correct.

if we put values of x given in other options and find value of y we cannot find whole table satisfying the equation.

hence option 1 is correct.

70

step-by-step explanation: