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w solution even if it's short

Question In The Picture W Solution Even If Its Short class=

Sagot :

MALINAOMADIEE25GO

Answer:

-4

Step-by-step explanation:

3x²+12x=21

x²+4x+(4x1/2)=7+(4x1/2)²

x²+4x+2²=7+2²

(x+2)²=7+2²

(x+2)²=11

x+2=√11 or

x+2=-√11

x=√11-2 or

x=-√11-2

-4

hope it helps ily❤

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