Question

(x-2) (x+2) - (x-5)^2

Answer 1

Ответ:

...................

Answer 2

Ответ:

x²-x=2x-5

x²-x-2x+5=0

x²-3x+5=0

D=(-3)²-4*5*1=9-20= -11<0

D<0 - корней неи

Объяснение:

Answer 3

To simplify the given expression, let's expand the terms and combine like terms:

(x - 2) (x + 2) - (x - 5)^2

Expanding the first term: = (x * x) + (x * 2) + (-2 * x) + (-2 * 2)

Simplifying the terms: = x^2 + 2x - 2x - 4

The x and -2x terms cancel each other out: = x^2 - 4

Expanding the second term: = (x - 5) * (x - 5) = (x * x) + (x * -5) + (-5 * x) + (-5 * -5) = x^2 - 5x - 5x + 25 = x^2 - 10x + 25

Substituting back into the original expression: x^2 - 4 - (x^2 - 10x + 25)

Distribute the negative sign inside the parentheses: x^2 - 4 - x^2 + 10x - 25

Combine like terms: (-4 - 25) + (x^2 - x^2) + 10x = -29 + 10x

Therefore, the simplified expression is -29 + 10x.