Question

(3x-2)(3x+2)-3x(3x-1) при x=-0.2

Answer 1

Ответ:

(3х-2)(3х+2)-3х(3х-1)=9$x^{2}$-4-9$x^{2}$+3х=3х-4  х=-0.2

-0.6-4=-4.6

Объяснение:

Answer 2

Ответ:

(-0,6-2)(-0,6+2)-0,6(0,6-1)

-2,6*1,4-0,6*(-0,4)

-3,64+0,24

-3,4

Answer 3

To find the value of the expression (3x-2)(3x+2)-3x(3x-1) when x = -0.2, we can substitute the value of x into the expression and simplify it.

Let's calculate it step by step:

Step 1: Substitute the value of x into the expression: (3(-0.2)-2)(3(-0.2)+2)-3(-0.2)(3(-0.2)-1)

Step 2: Simplify each part of the expression: ((-0.6)-2)((-0.6)+2)-(-0.6)((-0.6)-1)

Step 3: Continue simplifying: (-2.6)(1.4)-(-0.6)(-1.6)

Step 4: Multiply each term: -3.64-0.96

Step 5: Perform subtraction: -4.6

Therefore, when x = -0.2, the expression (3x-2)(3x+2)-3x(3x-1) equals -4.6.