Answer:
he started with either 20 or 15 i probably thought about this way to much so this is the best i could come up with
Step-by-step explanation:
Answer:
x²+6x+9=0
x²+3x+3x+9=0
x(x+3)+3(x+3)=0
(x+3)(x+3)=0
either
x+3=0
x=-3
or
x+3=0
x=-3
Step-by-step explanation:
next method
x²+6x+9=0
x²+2×x×3+3²=0
it is in formula of (x+y)²
(x+3)²=0
x+3=√0
x+3=0
x=-3
Answer:
X=26
Step-by-step explanation:
180-105=75
26•2=52. 52+23=75°
Answer:
The intial value is 1.25
Step-by-step explanation:
Answer:
D 111.4 cm²
Step-by-step explanation: