Sagot :
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 ,
[tex]\sf\longrightarrow[/tex] x² - 12x = -15
Now for completing the square ,
[tex]\sf\longrightarrow[/tex] x² -2(6)(x) = -15
[tex]\sf\longrightarrow[/tex] x² - 2(6)(x) + 6² = 6² - 15
[tex]\sf\longrightarrow[/tex] (x -6)² = 6² - 15
[tex]\sf\longrightarrow[/tex] (x -6)² = 36 -15
[tex]\sf\longrightarrow[/tex] (x - 6)² = 21
Hence the required answer is (x-6)² = 21.
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