Complete the square to solve 3x^2+12x=9

(x + 2)² = 7

Step-by-step explanation:

We have to complete the square in the given equation

3x² + 12x = 9

3x² + 12x - 9 = 0

3[x² + 4x -3] = 0

3[x² + 2(2x) + 4 - 4 - 3] = 0

3[x² + 2(2x) + 4] - 3 × 7 = 0

3[x² + 2]² - 21 = 0

(x + 2)² = = 7

Therefore, the square form of the equation is (x + 2)² = 7

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.