Question

4x -9x , если x=-7 ;x=0,8

Answer 1

4*(-7)-9*0,8=

-28-7,2=

-35,2

Answer 2

4х - 9х
При х=7
4*7-9*7=28-63= -35

При х=0,8
4*0,8-9*0,8=3,2-7,2= -4

Answer 3

To find the values of the expression 4x - 9x for the given values of x, simply substitute each value of x into the expression and perform the calculation. Let's calculate it step by step:

1. For x = -7: 4x - 9x = 4*(-7) - 9*(-7) = -28 + 63 = 35

2. For x = 0.8: 4x - 9x = 40.8 - 90.8 = 3.2 - 7.2 = -4

So, when x is equal to -7, the expression evaluates to 35, and when x is equal to 0.8, the expression evaluates to -4.