Question

Помогите решить 7 класс (8х во 2 степени - 4х + 3) - (5х во 2 степени + 2х + 3), упростите, х = -4.4

Answer 1

Надеюсь понятно что там написано)

Answer 2

Solving the Equation for 7th Grade

To solve the equation 8x^2 - 4x - (5x^2 + 2x + 3) when x = -4.4, we can follow these steps:

1. Substitute the value of x into the equation. 2. Simplify the equation by performing the operations.

Let's proceed with the calculation.

Substituting the Value of x

Substitute x = -4.4 into the equation:

8(-4.4)^2 - 4(-4.4) - (5(-4.4)^2 + 2(-4.4) + 3)

Simplifying the Equation

Perform the operations to simplify the equation:

8(19.36) + 17.6 - (5(19.36) - 8.8 + 3)

154.88 + 17.6 - (96.8 - 8.8 + 3)

154.88 + 17.6 - (91.2)

154.88 + 17.6 - 91.2

172.48 - 91.2

81.28

So, the value of the expression 8x^2 - 4x - (5x^2 + 2x + 3) when x = -4.4 is 81.28.