1.

X2+7x+12=0 by completing squares

Answer»

Step-by-step explanation:

x2 + 2*x*7/2 +49/4 -49/4 +12=0

(x+7/2)^2 = (49-48)/4

x + 7/2= plusminus 1/2

i) if x + 7/2= 1/2

then x = -3

ii) if x + 7/2 =-1/2

then x = -4

HOPE this HELPS!


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