Question

4х(х-1)-(2х+5)(2х-3)=9

Answer 1

Ответ:

4х^2+12х-(4х^2-25)=49

12х+25=49

12х=24

х=2

Объяснение:

Answer 2

To solve the equation 4x(x - 1) - (2x + 5)(2x - 3) = 9, we'll start by expanding the parentheses and simplifying the expression. Then we'll collect like terms and solve for x.

Expanding the equation: 4x(x - 1) - (2x + 5)(2x - 3) = 9 4x^2 - 4x - (4x^2 - 6x + 10x - 15) = 9 4x^2 - 4x - 4x^2 + 6x - 10x + 15 = 9 4x^2 - 4x^2 - 4x + 6x - 10x + 15 = 9 -8x + 15 = 9

Now, let's simplify further: -8x + 15 = 9 -8x = 9 - 15 -8x = -6

To solve for x, we divide both sides by -8: (-8x) / -8 = (-6) / -8 x = 3/4

Therefore, the solution to the equation 4x(x - 1) - (2x + 5)(2x - 3) = 9 is x = 3/4.