Question

Given the equation: x^2-12=-15

Answer 1

Given :-

• A equation x² - 12x = -15

To Find :-

• To write the equation in the form of (x-h)² = k .

Solution :-

The given equation to us is ,

$\sf\longrightarrow$ x² - 12x = -15

Now for completing the square ,

$\sf\longrightarrow$ x² -2(6)(x) = -15

$\sf\longrightarrow$ x² - 2(6)(x) + 6² = 6² - 15

$\sf\longrightarrow$ (x -6)² = 6² - 15

$\sf\longrightarrow$ (x -6)² = 36 -15

$\sf\longrightarrow$ (x - 6)² = 21

Hence the required answer is (x-6)² = 21.

Answer 2

Answer:

(x - 6)² = 21

Step-by-step explanation:

x² - 12x = - 15

Using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 6)x + 36 = - 15 + 36

(x - 6)² = 21