Question

1)(X-9)(x+)-(x-6)(x+6) 2)(x-0,5)(x+0,5)-(x-0,25) 3)(x-9)(x+9)=0 ПОЖАЛУЙСТА ДАМ 15 баллов срочно

Answer 1

Ответ:

1)x²+9x-(x²-36)

x²+9x-x²+36

9x+36

Объяснение:

2 ,3 что то немогу решить

Answer 2

1) (X-9)(x+)-(x-6)(x+6)

To simplify the expression (X-9)(x+)-(x-6)(x+6), we can expand and combine like terms.

Expanding the first term (X-9)(x+), we get: (X-9)(x+) = X(x+) - 9(x+)

Expanding the second term (x-6)(x+6), we get: (x-6)(x+6) = x(x+) + 6(x+) - 6(x) - 6(6)

Combining the terms, we have: X(x+) - 9(x+) + x(x+) + 6(x+) - 6(x) - 6(6)

Simplifying further, we get: X(x+) + x(x+) - 9(x+) + 6(x+) - 6(x) - 6(6)

Now, let's simplify each term: X(x+) = X^2 x(x+) = x^2 9(x+) = 9x 6(x+) = 6x 6(x) = 6x 6(6) = 36

Combining the simplified terms, we have: X^2 + x^2 - 9x + 6x - 6x - 36

Simplifying further, we get: X^2 + x^2 - 9x - 36

Therefore, the simplified expression is X^2 + x^2 - 9x - 36.

2) (x-0,5)(x+0,5)-(x-0,25)

To simplify the expression (x-0,5)(x+0,5)-(x-0,25), we can expand and combine like terms.

Expanding the first term (x-0,5)(x+0,5), we get: (x-0,5)(x+0,5) = x(x+0,5) - 0,5(x+0,5)

Expanding the second term (x-0,25), we get: (x-0,25)

Combining the terms, we have: x(x+0,5) - 0,5(x+0,5) - (x-0,25)

Simplifying further, we get: x^2 + 0,5x - 0,5x - 0,25 - x + 0,25

Simplifying the like terms, we have: x^2 - x

Therefore, the simplified expression is x^2 - x.

3) (x-9)(x+9)=0

To solve the equation (x-9)(x+9)=0, we can set each factor equal to zero and solve for x.

Setting x-9=0, we have: x=9

Setting x+9=0, we have: x=-9

Therefore, the solutions to the equation (x-9)(x+9)=0 are x=9 and x=-9.