Answer:
Step-by-step explanation:
I suggest you watch a video about completing the square if you're not sure what I'm doing.
1.
x^2+2x-3=0
(x^2+2x+1)-3-1=0
(x+1)^2-4=0
Hope this helped,
JoeLouis2
Question 7: Option (4)
Question 8: Option (3)
Question 9: Option (2)
subtract
a) 13/20
b) 1/2
c) 5/24
d) 7/18
e) 7/20
f) 3/40
Add or subtract
a) 4/9
c) 11/20
d) 1/4
e) 19/12 <u>or </u>1
f) 4/21
x= 113°
hope that helps^^