Question

X^2-9=(x+3) ^2решите пж уравнение​

Answer 1

Ответ:

Объяснение:

х ² - 9 = ( х + 3 ) ²

( х - 3 ) ( х + 3 ) - ( х + 3 ) ² = 0

( х + 3 ) ( х - 3 - х - 3 ) = 0

( х+3) (- 6) = 0

х + 3 =0

х= - 3

Answer 2

${x}^{2} - 9 = {(x + 3)}^{2} \\ {x}^{2} - 9 = {x}^{2} + 6x + 9 \\ 6x = - 18 \\ x = - 3$

Answer 3

To solve the equation x^2 - 9 = (x + 3)^2, let's first expand the right side of the equation:

x^2 - 9 = x^2 + 6x + 9

Now, let's simplify the equation by canceling out the x^2 terms on both sides:

-9 = 6x + 9

Next, let's isolate the variable x by subtracting 9 from both sides:

-9 - 9 = 6x

-18 = 6x

Finally, divide both sides by 6 to solve for x:

-18/6 = x

-3 = x

Therefore, the solution to the equation x^2 - 9 = (x + 3)^2 is x = -3.