Answer:
1. 2
2.i don't know
3.-3
4. three and two third
5.-2
Step-by-step explanation:
1. x2=4
x=+2
x=-2
x=2
answer:x1-2, x2=2
2. i don't know
3. x2+7x=-12
x2+7x+12=0
x2+4x+3x+12=0
xx(x+4)+(3x+4)=0
(x+4)x(x+3)=0
x+4=0
x+3=0
answer: x1=-4,x4x2= -3
4. 4x2-9=0
4x2=9
x2= nine and fourth
x=+ ⅔
x1= three and two third, x2 answer is three and two third
5. x2+4x+4=0
(x+2)2=0
x+2=0
answer: x=-2
